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Consolidated Statements of Cash Flows (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
OPERATING ACTIVITIES      
Net Income $ 9,281 $ 20,947 $ 14,066
Adjustments to reconcile net income to net cash provided by operating activities:      
Provision for doubtful accounts 139 123 (24)
Depreciation and amortization 10,415 9,324 8,397
Amortization of debt discount     543
Amortization of financing costs 528 649 802
Deferred rent (962) (668) (133)
Deferred income taxes (2,275) (3,011) (1,218)
Stock compensation expense 2,881 2,793 2,795
Undistributed equity earnings 5,354 (5,665) (2,896)
Intangible asset impairment (Note D)   1,069  
Loss on early retirement of debt (Note E) 102 1,363  
Changes in operating assets and liabilities (excluding the effects of business acquisitions)      
Accounts receivable 10,099 (14,741) 3,297
Inventory (8,207) 9,694 (5,365)
Prepaid expenses, other current assets and other assets (449) (529) 318
Accounts payable, accrued expenses and other liabilities 9,437 (166) (4,673)
Income taxes payable (579) 1,515 (3,722)
NET CASH PROVIDED BY OPERATING ACTIVITIES 35,764 22,697 12,187
INVESTING ACTIVITIES      
Purchases of property and equipment (3,842) (4,955) (4,959)
Equity investments   (2,765) (5,123)
Business acquisition, net of cash acquired   (14,500) (20,584)
Net proceeds from sale of property 11 27 31
NET CASH USED IN INVESTING ACTIVITIES (3,831) (22,193) (30,635)
FINANCING ACTIVITIES      
Proceeds from Revolving Credit Facility (Note E) 220,222 183,600  
Repayments from Revolving Credit Facility (Note E) (231,959) (180,257)  
Proceeds from Revolving Credit Facility, net (Note E)     43,525
Proceeds from Senior Secured Term Loan (Note E)   35,000  
Repayments from Senior Secured Term Loan (Note E) (14,375)    
Repayments of Term Loan (Note E)   (40,000)  
Repurchase of 4.75% convertible senior notes     (24,100)
Payments for stock repurchase (3,229)    
Financing Costs     (761)
Cash dividends paid (Note G) (1,515) (1,249) (913)
Payment of capital lease obligations     (78)
Proceeds from the exercise of stock options 1,215 577 225
Excess tax benefit from stock options 613 150  
NET CASH (USED IN) PROVIDED BY FINANCING ACTIVITIES (29,028) (2,179) 17,898
Effect of foreign exchange on cash 171 574 171
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS 3,076 (1,101) (379)
Cash and cash equivalents at beginning of year 1,871 2,972 3,351
CASH AND CASH EQUIVALENTS AT END OF YEAR $ 4,947 $ 1,871 $ 2,972