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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
OPERATING ACTIVITIES:    
Net income $ 7,446 $ 18,091
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 2,782 2,578
Provision for doubtful accounts 199 135
Stock-based compensation 300 299
Excess tax benefit from stock-based compensation (119) (556)
Issuance of non-employee director shares 75 100
Deferred income tax provision 1,082 417
Changes in operating assets and liabilities:    
Accounts receivable (1,982) (12,420)
Inventories 2,613 (15,268)
Prepaid expenses 328 1,568
Accounts payable (7,938) 5,109
Accrued liabilities (4,594) 3,819
Net cash flows from operating activities 192 3,872
INVESTING ACTIVITIES:    
Purchases of property, plant and equipment (2,036) (1,444)
Proceeds from sale of property, plant and equipment 20 989
Payments received on notes receivable 12 177
Net cash flows from investing activities (2,004) (278)
FINANCING ACTIVITIES:    
Payments on long-term obligations (5) (44)
Payments of cash dividends (4,315) (4,209)
Proceeds from stock option exercises 352 2,100
Excess tax benefit from stock-based compensation 119 556
Additions to deferred financing activities (11)  
Payments for common stock repurchased   (13,673)
Net cash flows from financing activities (3,860) (15,270)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND TEMPORARY INVESTMENTS (989) 995
NET CHANGE IN CASH AND TEMPORARY INVESTMENTS (6,661) (10,681)
CASH AND TEMPORARY INVESTMENTS, beginning of period 50,153 46,334
CASH AND TEMPORARY INVESTMENTS, end of period 43,492 35,653
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:    
Cash payments for interest 814 714
Cash payments for income taxes, net of refunds $ 3,738 $ 8,089