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Disclosure - Accounts Receivable And Contracts In Progress (Components Of Contracts In Progress) (Details) link:presentationLink link:calculationLink link:definitionLink 40302 - Disclosure - Accounts Receivable And Contracts In Progress (Components Of Contracts In Progress) (Details) (Alternative) link:presentationLink link:calculationLink link:definitionLink 40401 - Disclosure - Property And Equipment (Details) link:presentationLink link:calculationLink link:definitionLink 40502 - Disclosure - Goodwill And Other Intangible Assets (Change in the Carrying Amount Of Goodwill) (Details) link:presentationLink link:calculationLink link:definitionLink 40503 - Disclosure - Goodwill And Other Intangible Assets (Net Book Value Of Identifiable Assetsl) (Details) link:presentationLink link:calculationLink link:definitionLink 40601 - Disclosure - Accrued Expenses (Details) link:presentationLink link:calculationLink link:definitionLink 40702 - Disclosure - Long-term Debt (Schedule Of Long-Term Debt) (Details) link:presentationLink link:calculationLink link:definitionLink 40702 - Disclosure - Long-term Debt (Schedule Of Long-Term Debt) (Details) (Alternative) link:presentationLink link:calculationLink link:definitionLink 40703 - Disclosure - Long-Term Debt (Maturities Of Long-Term Debt) (Details) link:presentationLink link:calculationLink link:definitionLink 40902 - Disclosure - Income Taxes (Pre-Tax Income From Domestic And Foreign Operations) (Details) link:presentationLink link:calculationLink link:definitionLink 40903 - Disclosure - Income Taxes (Provision For Income Taxes) (Details) link:presentationLink link:calculationLink link:definitionLink 40904 - Disclosure - Income Taxes (Income Tax Provision Reconciliation) (Details) link:presentationLink link:calculationLink link:definitionLink 40906 - Disclosure - Income Taxes (Deferred Tax Assets (Liabilities)) (Details) link:presentationLink link:calculationLink link:definitionLink 40906 - Disclosure - Income Taxes (Deferred Tax Assets (Liabilities)) (Details) (Alternative) link:presentationLink link:calculationLink link:definitionLink 41202 - Disclosure - Commitments And Contingencies (Future Minimum Operating Lease Payments) (Details) link:presentationLink link:calculationLink link:definitionLink 41402 - Disclosure - Business Combinations And Reorganizations (Summary Of Purchase Price Allocation) (Details) link:presentationLink link:calculationLink link:definitionLink 41403 - Disclosure - Business Combinations And Reorganizations (Unaudited Pro Forma Consolidated Financial Information) (Details) link:presentationLink link:calculationLink link:definitionLink 41603 - Disclosure - Subsidiary Guarantors (Condensed Consolidated Statement Operations And Comprehensive Income) (Details) link:presentationLink link:calculationLink link:definitionLink 00090 - Document - Document And Entity Information link:presentationLink link:calculationLink link:definitionLink 00105 - Statement - Consolidated Balance Sheets (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 00305 - Statement - Consolidated Statements Of Comprehensive Income (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 00400 - Statement - Consolidated Statements Of Equity link:presentationLink link:calculationLink link:definitionLink 00405 - Statement - Consolidated Statements Of Equity (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 10101 - Disclosure - Nature Of Business And Summary Of Signicant Accounting Policies link:presentationLink link:calculationLink link:definitionLink 10201 - Disclosure - Restricted And Escrowed Cash link:presentationLink link:calculationLink link:definitionLink 10301 - Disclosure - Accounts Receivable And Contracts In Progress link:presentationLink link:calculationLink link:definitionLink 10401 - Disclosure - Property And Equipment link:presentationLink link:calculationLink link:definitionLink 10501 - Disclosure - Goodwill And Other Intangible Assets link:presentationLink link:calculationLink link:definitionLink 10601 - Disclosure - Accrued Expenses link:presentationLink link:calculationLink link:definitionLink 10701 - Disclosure - Long-term Debt link:presentationLink link:calculationLink link:definitionLink 10801 - Disclosure - Fair Value Measurements link:presentationLink link:calculationLink link:definitionLink 10901 - Disclosure - Income Taxes link:presentationLink link:calculationLink link:definitionLink 11001 - Disclosure - Share-Based Compensation link:presentationLink link:calculationLink link:definitionLink 11101 - Disclosure - Retirement Plans link:presentationLink link:calculationLink link:definitionLink 11201 - Disclosure - Commitments And Contingencies link:presentationLink link:calculationLink link:definitionLink 11301 - Disclosure - Related-Party Transactions link:presentationLink link:calculationLink link:definitionLink 11401 - Disclosure - Business Combinations And Reorganizations link:presentationLink link:calculationLink link:definitionLink 11501 - Disclosure - Segment Information link:presentationLink link:calculationLink link:definitionLink 11601 - Disclosure - Subsidiary Guarantors link:presentationLink link:calculationLink link:definitionLink 11701 - Schedule - Schedule II—Valuation And Qualify Accounts link:presentationLink link:calculationLink link:definitionLink 20101 - Disclosure - Nature Of Business And Summary Of Significant Accounting Policies link:presentationLink link:calculationLink link:definitionLink 30103 - Disclosure - Nature Of Business And Summary Of Significant Accounting Policies (Tables) link:presentationLink link:calculationLink link:definitionLink 30303 - Disclosure - Accounts Receivable And Contracts In Progress (Tables) link:presentationLink link:calculationLink link:definitionLink 30401 - Disclosure - Property And Equipment (Tables) link:presentationLink link:calculationLink link:definitionLink 30501 - Disclosure - Goodwill And Other Intangible Assets (Tables) link:presentationLink link:calculationLink link:definitionLink 30601 - Disclosure - Accrued Expenses (Tables) link:presentationLink link:calculationLink link:definitionLink 30703 - Disclosure - Long-Term Debt (Tables) link:presentationLink link:calculationLink link:definitionLink 30801 - Disclosure - Fair Value Measurements (Tables) link:presentationLink link:calculationLink link:definitionLink 30903 - Disclosure - Income Taxes (Tables) link:presentationLink link:calculationLink link:definitionLink 31003 - Disclosure - Share-Based Compensation (Tables) link:presentationLink link:calculationLink link:definitionLink 31103 - Disclosure - Retirement Plans (Tables) link:presentationLink link:calculationLink link:definitionLink 31203 - Disclosure - Commitments And Contingencies (Tables) link:presentationLink link:calculationLink link:definitionLink 31403 - Disclosure - Business Combinations And Reorganizations (Tables) link:presentationLink link:calculationLink link:definitionLink 31501 - Disclosure - Segment Information (Tables) link:presentationLink link:calculationLink link:definitionLink 31601 - Disclosure - Subsidiary Guarantors (Tables) link:presentationLink link:calculationLink link:definitionLink 40101 - Disclosure - Nature Of Business And Summary Of Significant Accounting Policies (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 40102 - Disclosure - Nature Of Business And Summary Of Significant Accounting Policies (Estimated Useful Lives By Class Of Assets) (Details) link:presentationLink link:calculationLink link:definitionLink 40201 - Disclosure - Restricted And Escrowed Cash (Details) link:presentationLink link:calculationLink link:definitionLink 40501 - Disclosure - Goodwill And Other Intangible Assets (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 40701 - Disclosure - Long-term Debt (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 40801 - Disclosure - Fair Value Measurements (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 40802 - Disclosure - Fair Value Measurements (Fair Value Measurements at Reporting Date Using) (Details) link:presentationLink link:calculationLink link:definitionLink 40803 - Disclosure - Fair Value Measurements (Fair Value Measurements Using Significant Unobservable) (Details) link:presentationLink link:calculationLink link:definitionLink 40804 - Disclosure - Fair Value Measurements (Balance Sheet Location) (Details) link:presentationLink link:calculationLink link:definitionLink 40901 - Disclosure - Income Taxes (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 40905 - Disclosure - Income Taxes (Reconciliation Of Unrecognized Tax Benefits) (Details) link:presentationLink link:calculationLink link:definitionLink 41001 - Disclosure - Share-Based Compensation (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 41002 - Disclosure - Share-Based Compensation (Option Pricing Assumptions) (Details) link:presentationLink link:calculationLink link:definitionLink 41003 - Disclosure - Share-Based Compensation (Summary Of Stock Option Activity) (Details) link:presentationLink link:calculationLink link:definitionLink 41004 - Disclosure - Share-Based Compensation (Summary Of Non-Vested Restricted Stock Units) (Details) link:presentationLink link:calculationLink link:definitionLink 41101 - Disclosure - Retirement Plans (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 41102 - Disclosure - Retirement Plans (Schedule Of Multiemployer Plans) (Details) link:presentationLink link:calculationLink link:definitionLink 41201 - Disclosure - Commitments And Contingencies (Details) link:presentationLink link:calculationLink link:definitionLink 41301 - Disclosure - Related-Party Transactions (Details) link:presentationLink link:calculationLink link:definitionLink 41401 - Disclosure - Business Combinations And Reorganizations (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 41501 - Disclosure - Segment Information (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 41502 - Disclosure - Segment Information (Segment Reporting By Segment) (Details) link:presentationLink link:calculationLink link:definitionLink 41503 - Disclosure - Segment Information (Dredging Revenue By Type Of Work) (Details) link:presentationLink link:calculationLink link:definitionLink 41504 - Disclosure - Segment Information (Revenues And Gross Profit From Foreign Operations) (Details) link:presentationLink link:calculationLink link:definitionLink 41601 - Disclosure - Subsidiary Guarantors (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 41602 - Disclosure - Subsidiary Guarantors (Condensed Consolidated Balance Sheets) (Details) link:presentationLink link:calculationLink link:definitionLink 41604 - Disclosure - Subsidiary Guarantors (Condensed Consolidated of Cash Flow) (Details) link:presentationLink link:calculationLink link:definitionLink 41701 - Schedule - Schedule II—Valuation And Qualifying Accounts (Details) link:presentationLink link:calculationLink link:definitionLink