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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
Cash flows from operating activities:      
Net income $ 50,966 $ 176,890 $ 42,949
Adjustments to reconcile net income to net cash provided by (used in) operating activities:      
Depreciation and amortization 11,110 15,554 13,073
Impairment of goodwill    1,811 837
Provision for doubtful accounts 574 914 2,838
Noncash stock compensation 838 832 1,060
Gain on termination of license    (198,838)   
Excess tax benefits from stock-based compensation arrangements (700) (100) (110)
Deferred tax expense (benefit) 4,844 (7,903) (1,009)
Change in fair value of derivatives    (68) (272)
Changes in:      
Accounts receivable 71,776 27,302 (88,915)
Inventories 29,240 13,568 (60,494)
Other assets 426 (9,611) 993
Accounts payable and accrued expenses (33,156) (40,773) 72,664
Income taxes, net (86,724) 81,063 (7,335)
Net cash provided by (used in) operating activities 49,194 60,641 (23,721)
Cash flows from investing activities:      
Purchases of short-term investments (381,843)    (10,823)
Proceeds from sale of short-term investments 207,082    62,111
Proceeds from termination of license, net of transaction fees and other settlements    235,650   
Purchases of equipment and leasehold improvements (5,015) (9,474) (9,946)
Payment for intangible assets acquired (7,769) (19,717) (4,605)
Proceeds from sale of equipment 2,801      
Proceeds from sale of trademark 3,481      
Net cash provided by (used in) investing activities (181,263) 206,459 36,737
Cash flows from financing activities:      
Proceeds from (repayments of) loans payable - banks (21,835) 15,300 7,230
Repayment of long-term debt    (4,379) (11,673)
Purchase of treasury stock (98) (90)   
Proceeds from exercise of options including tax benefits 1,668 1,305 983
Excess tax benefits from stock-based compensation arrangements 700 100 110
Proceeds from sale of stock of subsidiary 657 3,396 2,756
Payment for acquisition of noncontrolling interests       (750)
Dividends paid (28,331) (9,780) (9,304)
Dividends paid to noncontrolling interest (8,341) (3,333) (3,149)
Net cash provided by (used in) financing activities (55,580) 2,519 (13,797)
Effect of exchange rate changes on cash 5,964 1,860 (911)
Net increase (decrease) in cash and cash equivalents (181,685) 271,479 (1,692)
Cash and cash equivalents - beginning of year 307,335 35,856 37,548
Cash and cash equivalents - end of year 125,650 307,335 35,856
Supplemental disclosure of cash flow information:      
Interest 1,524 1,799 1,972
Income taxes $ 104,992 $ 20,584 $ 32,716