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Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)
In Thousands, unless otherwise specified
 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Cash Flows From Operating Activities:    
Net income $ 11,734 $ 11,193
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 11,666 10,703
Amortization of intangible assets   50
Allowance on notes receivable   4,071
Provision for doubtful accounts (429) (33)
Equity in earnings of unconsolidated subsidiary, net of dividends received   394
Amortization of debt issuance costs 1,119 1,532
Deferred income taxes 572 1,041
Loss on disposal of property and equipment 455 180
Gain on sale of business   (2,887)
Stock based compensation expense 2,199 519
Unrealized loss (gain) on foreign currency forward contracts 353 (804)
Changes in operating assets and liabilities:    
Trade and other receivables, net (657) (21,468)
Costs and estimated earnings in excess of billings on uncompleted contracts, net (18,351) (5,801)
Inventories (24,078) (14,549)
Refundable income taxes (4,982) 15,099
Prepaid expenses and other assets 4,099 1,087
Accounts payable 4,562 (1,333)
Accrued and other liabilities 33,937 10,508
Net cash provided by operating activities 22,199 9,502
Cash Flows From Investing Activities:    
Additions to property and equipment (11,277) (11,496)
Proceeds from sale of business   13,727
Proceeds from the sale of property and equipment 1,054 96
Issuance of note receivable (1,000)  
Other investing activities   800
Net cash provided by (used in) investing activities (11,223) 3,127
Cash Flows From Financing Activities:    
Proceeds from issuance of common stock 37 146
Tax withholdings related to net share settlements of restricted stock awards and performance shares (212) (51)
Payments on long-term debt (4,286) (4,286)
Borrowings under note payable to financial institution 109,300 109,050
Payments on note payable to financial institution (113,011) (115,050)
Payments on capital lease obligations (2,557) (2,417)
Payments of debt amendment costs (401)  
Net cash used in financing activities (11,130) (12,608)
Change in cash and cash equivalents (154) 21
Cash and cash equivalents, beginning of period 182 51
Cash and cash equivalents, end of period 28 72
Non-cash investing activity:    
Escrow account related to capital lease financing 898 2,726
Accrued property and equipment purchases 1,284 1,834
Capital lease additions $ 142