CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Cash flows from operating activities:
Net income	$ 23,278	$ 55,285
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	13,500	11,327
Amortization	32,632	23,940
Stock-based compensation expense	14,660	12,948
Deferred income tax provision (benefit)	(35,637)	4,666
Decrease (increase) in:
Accounts receivable, net	(15,971)	53,823
Inventories, net	(65,946)	8,821
Other current assets	32,612	42,796
Increase (decrease) in:
Accounts payable	(14,931)	(23,997)
Accrued expenses and other liabilities	17,035	(59,417)
Income tax liabilities	(51,660)	(39,677)
Other	22,232	30
Net cash provided by (used in) operating activities	(28,196)	90,545
Cash flows from investing activities:
Purchase of property, plant and equipment	(15,115)	(18,505)
Purchase of marketable securities	(339,841)	(509,350)
Redemption of marketable securities	316,192	476,505
Purchase of trademarks	(12,000)	0
Other investing activities	(42,317)	0
Net cash used in investing activities	(93,081)	(51,350)
Cash flows from financing activities:
Net proceeds from common stock options exercised by employees under stock option plans	24,819	2,777
Tax benefit related to stock-based compensation	117	12
Treasury stock transactions	(1,636)	(93)
Net cash provided by financing activities	23,300	2,696
Effect of exchange rate changes on cash	(2,708)	(3,880)
Increase (decrease) in cash and cash equivalents	(100,685)	38,011
Cash and cash equivalents, beginning of period	935,675	1,579,515
Cash and cash equivalents, end of period	$ 834,990	$ 1,617,526