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Consolidated Statements Of Cash Flows (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Cash flows from operating activities:      
Net income (loss) $ 22,068 $ 10,984 $ (5,789)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:      
Depreciation and amortization of fixed and intangible assets 13,546 11,123 10,804
Amortization of other long term assets 1,983 3,258 2,683
Amortization of discounted liabilities 1,371    
Stock-based compensation 1,994 1,122 1,223
Increase(decrease) in deferred income taxes 4,711 5,342 (778)
Changes in assets and liabilities associated with operations:      
(Increase) decrease in net receivables (35,021) 6,967 10,905
Decrease (increase) in inventories 2,986 (1,542) 18,114
Decrease (increase) in income tax receivable 6,512 (2,583) (4,132)
(Increase) in prepaid expenses and other assets (1,823) (2,235) (2,898)
Increase (decrease) in accounts payable 8,384 3,095 (2,828)
Increase in deferred revenue 2,003 5,568  
Increase (decrease) in other payables and accrued expenses 10,552 (7,909) 4,647
Net cash provided by operating activities 39,266 33,190 31,951
Cash flows from investing activities:      
Capital expenditures (6,261) (8,004) (4,322)
Acquisitions of intangible assets (316) (32,677)  
Net cash used in investing activities (6,577) (40,681) (4,322)
Cash flows from financing activities:      
Net (repayments) borrowings under line of credit agreement (7,300) 4,700 (21,900)
Payments on long-term debt (8,429) (8,107) (4,106)
Payment on other long-term liabilities (401)    
Increase (decrease) in other notes payable 20,063 11,586 (2,438)
Proceeds from the issuance of common stock 580 768 1,470
Payment of cash dividends (2,205) (819) (1,611)
Net cash provided (used in) by financing activities 2,308 8,128 (28,585)
Net increase (decrease) in cash 34,997 637 (956)
Effect of exchange rate changes on cash (1,070) 138 110
Cash at beginning of year 1,158 383 1,229
Cash at end of year 35,085 1,158 383
Supplemental cash flow information:      
Interest 2,055 3,661 3,279
Income taxes $ 6,359 $ 2,205 $ 3,361