CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY Statement - USD ($) $ in Thousands	Total	Common Stock and Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Earnings (loss)	Treasury Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period	$ 1,871,433	$ 16,692	$ 2,020,686	$ (165,945)	$ 0
Balance at end of period	1,871,433	16,692	2,020,686	(165,945)	0
Repurchase of common stock	(150,000)	(23,371)	(126,629)	0	0
Common stock issued pursuant to stock-based compensation plans, net	580	580	0	0	0
Stock-based compensation	7,403	7,403	0	0	0
Dividends paid	(22,728)	0	(22,728)	0	0
Other Comprehensive Income (Loss), Net of Tax	$ (17,532)	0	0	(17,532)	0
Common Stock, Dividends, Per Share, Cash Paid	$ 0.17
Net earnings	$ 15,424	0	15,424	0	0
Balance at beginning of period	1,704,580	1,304	1,886,753	(183,477)	0
Balance at end of period	1,704,580	1,304	1,886,753	(183,477)	0
Balance at beginning of period	1,883,374	31,767	2,017,097	(157,986)	(7,504)
Balance at end of period	1,883,374	31,767	2,017,097	(157,986)	(7,504)
Stock Issued During Period, Value, Acquisitions	205	205	0	0	0
Common stock issued pursuant to stock-based compensation plans, net	249	249	0	0	0
Stock-based compensation	9,880	9,880	0	0	0
Dividends paid	(22,319)	0	(22,319)	0	0
Other Comprehensive Income (Loss), Net of Tax	$ (322)	0	0	(322)	0
Common Stock, Dividends, Per Share, Cash Paid	$ 0.17
Net earnings	$ 38,807	0	38,807	0	0
Balance at beginning of period	1,909,874	42,101	2,033,585	(158,308)	(7,504)
Balance at end of period	$ 1,909,874	$ 42,101	$ 2,033,585	$ (158,308)	$ (7,504)