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Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)
In Thousands, unless otherwise specified
 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Cash Flows From Operating Activities:    
Net income $ 8,338 $ 7,909
Adjustments to reconcile net income to net cash provided by (used in) operating activities:    
Depreciation and amortization 7,459 7,047
Amortization of intangible assets   50
Allowance on notes receivable   3,171
Provision for doubtful accounts (452) (909)
Equity in earnings of unconsolidated subsidiary, net of dividends received   394
Amortization of debt issuance costs 936 1,021
Deferred income taxes 610 654
Loss on disposal of property and equipment 14 292
Gain on sale of business   (2,887)
Stock based compensation expense 1,275 449
Unrealized loss on foreign currency forward contracts 86 290
Changes in operating assets and liabilities:    
Trade and other receivables, net (1,883) (29,164)
Costs and estimated earnings in excess of billings on uncompleted contracts, net (14,630) (10,202)
Inventories (13,285) 3,072
Refundable income taxes   15,099
Prepaid expenses and other assets 3,727 904
Accounts payable 10,394 (9,045)
Accrued and other liabilities 21,837 7,061
Net cash provided by (used in) operating activities 24,426 (4,794)
Cash Flows From Investing Activities:    
Additions to property and equipment (8,013) (8,580)
Proceeds from sale of business   13,727
Proceeds from the sale of property and equipment 959 95
Issuance of notes receivable (1,000)  
Other investing activities   567
Net cash provided by (used in) investing activities (8,054) 5,809
Cash Flows From Financing Activities:    
Proceeds from issuance of common stock 37 90
Tax withholdings related to net share settlements of restricted stock awards and performance shares (145) (51)
Payments on long-term debt (4,286) (4,286)
Borrowings under note payable to financial institution 71,800 88,050
Payments on note payable to financial institution (81,800) (83,231)
Payments on capital lease obligations (1,734) (1,595)
Payments of debt amendment costs (401)  
Net cash used in financing activities (16,529) (1,023)
Change in cash and cash equivalents (157) (8)
Cash and cash equivalents, beginning of period 182 51
Cash and cash equivalents, end of period 25 43
Non-cash investing activity:    
Escrow account related to capital lease financing 897 2,726
Accrued property and equipment purchases 1,716 1,028
Capital lease additions $ 142