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Consolidated Statements of Cash Flows - USD ($)
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Cash flows from operating activities:      
Net loss $ (29,388,000) $ (17,887,000) $ (923,000)
Adjustments to reconcile net loss to net cash provided by operating activities:      
Depreciation 9,092,000 13,606,000 $ 13,272,000
Goodwill, Impairment Loss $ 5,282,000 16,066,000
Loss on sale of business $ 13,497,000
Tangible Asset Impairment Charges $ 27,500,000
Amortization of Intangible Assets $ 523,000 $ 540,000 0
Amortization of debt issuance costs 598,000 377,000 634,000
Provision for doubtful accounts (4,000) 70,000 (1,063,000)
Deferred income taxes (3,560,000) 2,894,000 (7,994,000)
Loss on disposal of property and equipment 105,000 489,000 256,000
Stock-based compensation expense 1,774,000 2,946,000 $ 3,060,000
Excess tax benefit from stock compensation plans (19,000) (553,000)
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability (211,000) (1,746,000)
Unrealized loss (gain) on foreign currency forward contracts $ 295,000 (13,000) $ (195,000)
Other, net 25,000 249,000
Changes in operating assets and liabilities, net of acquired assets and assumed liabilities      
Trade and other receivables, net $ 26,780,000 $ 7,984,000 $ (24,212,000)
Insurance settlement 2,625,000
Costs and estimated earnings in excess of billings on uncompleted contracts, net 940,000 $ 4,088,000 $ 19,736,000
Inventories 43,695,000 6,039,000 8,261,000
Refundable income taxes 1,285,000 (3,405,000) (1,073,000)
Prepaid expenses and other assets 896,000 754,000 307,000
Accounts payable (9,894,000) (5,273,000) 1,374,000
Deferred revenue (271,000) (4,573,000) (3,901,000)
Accrued and other liabilities 4,663,000 (881,000) (15,226,000)
Net cash provided by operating activities 55,206,000 35,044,000 20,089,000
Cash flows from investing activities:      
Additions to property and equipment (8,515,000) (14,289,000) $ (28,447,000)
Proceeds from sale of business $ 4,300,000 $ 29,791,000
Acquisition of businesses, net of cash acquired $ (15,689,000)
Proceeds from sale of property and equipment $ 55,000 $ 8,000 1,711,000
Issuance of notes receivable (5,700,000)
Collections on notes receivable $ 7,219,000 $ 56,000 124,000
Other investing activities (25,000) (250,000)
Net cash provided by (used in) investing activities $ 3,059,000 15,541,000 (48,251,000)
Cash flows from financing activities:      
Proceeds from issuance of common stock 1,000 28,000 72,000
Tax withholdings related to net share settlements of restricted share awards and performance shares (424,000) (1,283,000) $ (802,000)
Excess tax benefit from stock compensation plans $ 19,000 553,000
Payments on long-term debt (6,357,000) $ (5,714,000)
Borrowings on line of credit $ 79,250,000 230,581,000 220,721,000
Repayments on line of credit (124,837,000) $ (272,913,000) $ (180,334,000)
Payments of debt issuance costs (302,000)
Payments on capital lease obligations (2,190,000) $ (1,255,000) $ (5,239,000)
Net cash (used in) provided by financing activities (48,483,000) (50,646,000) 28,704,000
Change in cash and cash equivalents 9,782,000 (61,000) 542,000
Cash and cash equivalents, beginning of period 527,000 588,000 46,000
Cash and cash equivalents, end of period 10,309,000 527,000 588,000
Supplemental disclosure of cash flow information:      
Cash paid during the period for interest, net of amounts capitalized 846,000 2,271,000 3,277,000
Cash (received) paid during the period for income taxes (net of refunds of $7,949, $393, and $311) (7,743,000) 1,982,000 9,592,000
Non-cash investing and financing activities:      
Accrued property and equipment purchases 397,000 1,243,000 $ 1,656,000
Capital lease additions $ 854,000 $ 804,000