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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) (USD $)
In Thousands
 6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Cash flows from operating activities:    
Net income $ 16,044 $ 10,153
net cash provided by operating activities:    
Depreciation and amortization 5,629 5,205
Changes in operating assets and liabilities:    
Accounts receivable (9,271) (12,075)
Inventories (13,523) 2,795
Accounts payable 5,728 4,697
Commissions payable 290 3,315
Accrued expenses and other 2,431 2,421
Net cash provided by operating activities 7,328 16,511
Cash flows from investing activities:    
Capital additions - net (5,924) (3,966)
Change in short-term investments 259 (8)
Net cash used for investing activities (5,665) (3,974)
Cash flows from financing activities:    
Cash dividends (3,651) (3,509)
Payments to bank for borrowings (5,000) (15,000)
Purchase of common shares for treasury   (648)
Other (28)  
Net cash used for financing activities (8,679) (19,157)
Effect of exchange rate changes on cash 505 (567)
Net decrease in cash and cash equivalents (6,511) (7,187)
Cash and cash equivalents:    
Beginning of year 32,229 44,403
June 30, $ 25,718 $ 37,216