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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
OPERATING ACTIVITIES:    
Net income $ 4,556 $ 13,220
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 1,850 1,732
Provision for doubtful accounts 154 90
Stock-based compensation 200 200
Excess tax benefit from stock-based compensation (119) (395)
Issuance of non-employee director shares 75 100
Deferred income tax provision 49 443
Changes in operating assets and liabilities:    
Accounts receivable (6,552) (7,102)
Inventories (62) (10,363)
Prepaid expenses (214) 1,459
Accounts payable (3,069) 3,905
Accrued liabilities (1,621) 5,700
Net cash flows from operating activities (4,753) 8,989
INVESTING ACTIVITIES:    
Purchases of property, plant and equipment (1,292) (926)
Proceeds from sale of property, plant and equipment 1 989
Payments received on notes receivable 8 173
Net cash flows from investing activities (1,283) 236
FINANCING ACTIVITIES:    
Payments on long-term obligations (5) (37)
Payments of cash dividends (2,876) (2,844)
Proceeds from stock option exercises 351 1,799
Excess tax benefit from stock-based compensation 119 395
Additions to deferred financing activities (11)  
Payments for common stock repurchased   (1,098)
Net cash flows from financing activities (2,422) (1,785)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND TEMPORARY INVESTMENTS (935) 1,157
NET CHANGE IN CASH AND TEMPORARY INVESTMENTS (9,393) 8,597
CASH AND TEMPORARY INVESTMENTS, beginning of period 50,153 46,334
CASH AND TEMPORARY INVESTMENTS, end of period 40,760 54,931
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:    
Cash payments for interest 545 210
Cash payments for income taxes, net of refunds $ 3,214 $ 2,004