Condensed Consolidated Statement of Equity and Comprehensive Income (Unaudited) (USD $) In Thousands, except Share data	Total	Common Stock	Paid-in Capital	Retained Earnings	Common Stock Held in Treasury	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interest in Subsidiary	Comprehensive Income
Beginning Balance at Apr. 01, 2011	$ 844,241	$ 4	$ 601,029	$ 254,722	$ (17,907)	$ 2,277	$ 4,116
Beginning Balance, shares at Apr. 01, 2011		42,225,130			(560,363)
Exercise of stock options	4,088		4,088
Exercise of stock options, shares		219,114
Issuance of stock under Employee Stock Purchase Plan	2,079		2,079
Issuance of stock under Employee Stock Purchase Plan, shares		56,523
Stock-based compensation expense	9,939		9,939
Shares issued in settlement of certain accrued employee compensation liabilities	6,340		6,340
Shares issued in settlement of certain accrued employee compensation liabilities, shares		156,825
RSU awards vesting, shares	145,695	145,695
Purchase of treasury shares pursuant to vesting of certain RSU agreements	(2,250)				(2,250)
Purchase of treasury shares pursuant to vesting of certain RSU agreements, shares					(51,403)
Net income	9,763			9,734			29	9,763
Hedging transactions, net of tax	(721)					(721)		(721)
Foreign currency translation, net of tax	(694)					(694)		(694)
Comprehensive income								8,348
Ending Balance at Sep. 30, 2011	$ 872,785	$ 4	$ 623,475	$ 264,456	$ (20,157)	$ 862	$ 4,145
Ending Balance, shares at Sep. 30, 2011		42,803,287			(611,766)