Condensed Consolidated Statements Of Equity Condensed Consolidatd Statements of Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Treasury Stock, Common	Additional Paid-in Capital	Retained Earnings	Foreign currency translation adjustments	Defined benefit pension adjustments
Balance (in shares)		141,283
Balance	$ 993,018	$ 1,413	$ 0	$ 867,699	$ 147,418	$ (22,593)	$ (919)
Shares issued under stock plans (in shares)		815
Shares issued under stock plans	(13,650)	$ 8	0	(13,658)	0	0	0
Share-based compensation expense	4,128	$ 0	0	4,128	0	0	0
Repurchase and retirements of common stock (in shares)		(296)
Repurchase and retirements of common stock	(9,999)	$ (3)	0	(1,809)	(8,187)	0	0
Dividends declared ($0.07 per share)	(9,913)	0	0	13	(9,926)	0	0
Pension liability adjustments	4	0	0	0	0	0	4
Foreign currency translation adjustments	3,835	0	0	0	0	3,835	0
Net income	57,562	$ 0	0	0	57,562	0	0
Balance (in shares)		141,802
Balance	1,024,394	$ 1,418	0	856,373	186,276	(18,758)	(915)
Cumulative Effect of New Accounting Principle in Period of Adoption	(591)	$ 0	$ 0	0	(591)	0	0
Balance (in shares)		136,179	(202)
Balance	1,012,025	$ 1,362	$ (7,112)	837,658	213,753	(32,776)	(860)
Shares issued under stock plans (in shares)		572
Shares issued under stock plans	(6,812)	$ 5	0	(6,817)	0	0	0
Share-based compensation expense	4,653	$ 0	0	4,653	0	0	0
Repurchase and retirements of common stock (in shares)		(1,035)
Repurchase and retirements of common stock	(29,787)	$ (10)	0	(6,364)	(23,413)	0	0
Dividends declared ($0.07 per share)	(9,510)	0	0	7	(9,517)	0	0
Pension liability adjustments	24	0	0	0	0	0	24
Foreign currency translation adjustments	(2,787)	0	0	0	0	(2,787)	0
Net income	32,658	$ 0	$ 0	0	32,658	0	0
Balance (in shares)		135,716	(202)
Balance	$ 1,000,464	$ 1,357	$ (7,112)	$ 829,137	$ 213,481	$ (35,563)	$ (836)