CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY Statement - USD ($) $ in Thousands	Total	Common Stock and Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Earnings (loss)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period	$ 1,834,558	$ 91,162	$ 1,856,756	$ (113,360)
Balance at end of period	1,834,558	91,162	1,856,756	(113,360)
Repurchase of common stock	99,957	99,957
Common stock issued pursuant to stock-based compensation plans, net	9,520	9,520
Adjustments to Additional Paid in Capital, Share-based Compensation, Stock Options, Requisite Service Period Recognition	25,015	25,015
Dividends paid	(66,451)		(66,451)
Other Comprehensive Income (Loss), Net of Tax	0
Temporary Equity, Foreign Currency Translation Adjustments	(26,296)			(26,296)
Net earnings	183,909		183,909
Cumulative Effect of New Accounting Principle in Period of Adoption	80,280		80,280
Balance at beginning of period	1,868,888	10,388	2,003,464	(144,964)
Balance at end of period	1,868,888	10,388	2,003,464	(144,964)
Repurchase of common stock	0	0
Common stock issued pursuant to stock-based compensation plans, net	4,743	4,743
Adjustments to Additional Paid in Capital, Share-based Compensation, Stock Options, Requisite Service Period Recognition	10,609	10,609
Dividends paid	(22,121)		(22,121)
Other Comprehensive Income (Loss), Net of Tax	0
Temporary Equity, Foreign Currency Translation Adjustments	$ 5,308			5,308
Common Stock, Dividends, Per Share, Cash Paid	$ 0
Net earnings	$ 73,151		73,151
Balance at beginning of period	1,940,578	25,740	2,054,494	(139,656)
Balance at end of period	1,940,578	25,740	2,054,494	(139,656)
Balance at beginning of period	1,876,786	1,355	2,024,523	(149,092)
Balance at end of period	1,876,786	1,355	2,024,523	(149,092)
Repurchase of common stock	124,996	(37,817)	(87,179)
Common stock issued pursuant to stock-based compensation plans, net	10,318	10,318
Adjustments to Additional Paid in Capital, Share-based Compensation, Stock Options, Requisite Service Period Recognition	27,485	27,485
Dividends paid	(68,852)		(68,852)
Derivative, Gain (Loss) on Derivative, Net	(1,718)			(1,718)
Other Comprehensive Income (Loss), Net of Tax	4			4
Temporary Equity, Foreign Currency Translation Adjustments	$ (22,729)			(22,729)
Common Stock, Dividends, Per Share, Cash Paid	$ 0.17
Net earnings	$ 169,913		169,913
Balance at beginning of period	1,911,891	1,356	2,063,985	(153,450)
Balance at end of period	1,911,891	1,356	2,063,985	(153,450)
Repurchase of common stock	75,000	13,600	61,400
Common stock issued pursuant to stock-based compensation plans, net	3,314	3,314
Adjustments to Additional Paid in Capital, Share-based Compensation, Stock Options, Requisite Service Period Recognition	10,271	10,271
Dividends paid	(22,788)		(22,788)
Derivative, Gain (Loss) on Derivative, Net	(132)			(132)
Other Comprehensive Income (Loss), Net of Tax	0			0
Temporary Equity, Foreign Currency Translation Adjustments	(19,953)			(19,953)
Net earnings	62,047		62,047
Cumulative Effect of New Accounting Principle in Period of Adoption	3,439		3,439
Balance at beginning of period	1,869,650	1,341	2,041,844	(173,535)
Balance at end of period	$ 1,869,650	$ 1,341	$ 2,041,844	$ (173,535)