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Consolidated Statements Of Cash Flows (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
OPERATING ACTIVITIES      
Net Income $ 20,947 $ 14,066 $ 20,261
Adjustments to reconcile net income to net cash provided by operating activities:      
Extraordinary gain     (2,477)
Provision for doubtful accounts 123 (24) 376
Depreciation and amortization 9,324 8,397 9,810
Amortization of debt discount   543 1,802
Deferred rent (668) (133) 306
Deferred income taxes (3,011) (1,218) (2,691)
Stock compensation expense 2,793 2,795 2,928
Undistributed equity earnings (5,665) (2,896) (2,321)
Intangible asset impairment (Note C) 1,069    
Loss on early retirement of debt (Note E) 1,363   764
Changes in operating assets and liabilities (excluding the effects of business acquisitions)      
Accounts receivable (14,741) 3,297 (11,619)
Inventory 9,694 (5,365) 3,996
Prepaid expenses, other current assets and other assets 120 1,120 3,981
Accounts payable, accrued expenses and other liabilities (166) (4,673) 628
Income taxes payable 1,515 (3,722) 4,356
NET CASH PROVIDED BY OPERATING ACTIVITIES 22,697 12,187 30,100
INVESTING ACTIVITIES      
Purchases of property and equipment (4,955) (4,959) (2,864)
Equity investments (2,765) (5,123)  
Business acquisition, net of cash acquired (14,500) (20,584)  
Net proceeds from sale of property 27 31 70
NET CASH USED IN INVESTING ACTIVITIES (22,193) (30,635) (2,794)
FINANCING ACTIVITIES      
Repayments of prior credit facility, net     (24,601)
Proceeds from Revolving Credit Facility, net (Note E) 3,343 43,525 14,100
Proceeds from Senior Secured Term Loan (Note E) 35,000    
Proceeds (repayments) of Term Loan (Note E) (40,000)   40,000
Repurchase of 4.75% convertible senior notes   (24,100) (51,028)
Financing Costs   (761) (3,248)
Cash dividends paid (Note G) (1,249) (913)  
Payment of capital lease obligations   (78) (158)
Proceeds from the exercise of stock options 577 225 174
Excess tax benefits from exercise of stock options 150   124
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES (2,179) 17,898 (24,637)
Effect of foreign exchange on cash 574 171  
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS (1,101) (379) 2,669
Cash and cash equivalents at beginning of year 2,972 3,351 682
CASH AND CASH EQUIVALENTS AT END OF YEAR $ 1,871 $ 2,972 $ 3,351