Condensed Consolidated Statements of Cash Flows (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Cash flows from operating activities
Net (loss)/income	$ (7,896)	$ 18,888
Depreciation and amortization	16,738	14,061
Deferred financing cost amortization	98	231
Bad debt expense	165	(328)
Deferred income taxes	4,446	332
Stock-based compensation	1,818	1,876
Gain on sale of property and equipment	(184)	(357)
Gain on bargain purchase from acquisition of business	0	(2,176)
Excess tax benefit from stock option exercise	0	(59)
Change in operating assets and liabilities, excluding effects of businesses acquired:
Accounts receivable	23,356	3,100
Income tax receivable	(5,142)	75
Inventory	(409)	(883)
Note receivable	39	1,214
Prepaid expenses and other	957	637
Accounts payable	(15,022)	(2,967)
Accrued liabilities	(3,670)	3,633
Income tax payable	(262)	(10)
Billings in excess of costs and estimated earnings on uncompleted contracts, net	11,730	(18,347)
Deferred revenue	(43)	(41)
Net cash provided by (used in) operating activities	26,719	18,879
Cash flows from investing activities:
Proceeds from sale of property and equipment	807	526
Purchase of property and equipment	(12,694)	(25,071)
Acquisition of business in Pacific Northwest	0	(6,653)
Acquisition of TW LaQuay Dredging (net of cash acquired)	0	(64,000)
Net cash used in investing activities	(11,887)	(95,198)
Cash flows from financing activities:
Exercise of stock options	185	528
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures	0	0
Excess tax benefit from stock option exercise	0	59
Increase in loan costs	0	(404)
Purchases of shares into treasury	(3,003)	0
Net cash (used in) provided by financing activities	(2,818)	183
Net change in cash and cash equivalents	12,014	(76,136)
Cash and cash equivalents at beginning of period	23,174	104,736
Cash and cash equivalents at end of period	35,188	28,600
Supplemental disclosures of cash flow information:
Interest	160	84
Taxes (net of refunds)	$ (3,185)	$ 10,696