CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Cash flows from operating activities:
Net income	$ 221,187	$ 174,679
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	19,855	15,637
Provision for inventory obsolescence	1,455	2,904
Current and deferred income tax expense	94,532	65,384
Share-based compensation expense (benefit)	40,568	(37,790)
Expense associated with outstanding license fees	643	41,332
Amortization of debt discount and debt issue costs	8,902	13,647
Amortization of discount or premium on investments	3,303	3,406
Equity loss in affiliate and other	8,180	2,114
Excess tax benefits from share-based compensation	(2,084)	(6,486)
Changes in operating assets and liabilities:
Accounts receivable	(19,516)	(14,651)
Insurance proceeds receivable (Note 13)	(31,000)
Inventories	(4,790)	(13,996)
Prepaid expenses	(3,643)	(1,912)
Other assets	(2,742)	(722)
Accounts payable	(37,225)	1,040
Accrued expenses	30,105	(28,036)
Other liabilities	(109,311)	(17,984)
Net cash provided by operating activities	218,419	198,566
Cash flows from investing activities:
Purchases of property, plant and equipment	(90,650)	(36,725)
Purchases of held-to-maturity investments	(348,001)	(616,571)
Maturities of held-to-maturity investments	439,987	519,334
Acquisitions		(3,547)
Net cash provided by (used in) investing activities	1,336	(137,509)
Cash flows from financing activities:
Payments to repurchase common stock	(130,925)
Proceeds from the exercise of stock options	9,689	23,948
Excess tax benefits from share-based compensation	2,084	6,486
Net cash (used in) provided by financing activities	(119,152)	30,434
Effect of exchange rate changes on cash and cash equivalents	146	331
Net increase in cash and cash equivalents	100,749	91,822
Cash and cash equivalents, beginning of period	162,676	252,162
Cash and cash equivalents, end of period	263,425	343,984
Supplemental schedule of cash flow information:
Cash paid for interest	4,563	2,766
Cash paid for income taxes	75,046	25,050
Non-cash investing activities:
Non-cash additions to property, plant and equipment	4,775	14,290
Acquisitions-non cash consideration		$ 3,400