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	$ 1,876,786	$ 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	(24,998)	(16,999)	(7,999)	0
Common stock issued pursuant to stock-based compensation plans, net	8,709	8,709	0	0
Stock-based compensation	8,289	8,289	0	0
Dividends paid	(23,031)	0	(23,031)	0
Other Comprehensive Income (Loss), Net of Tax	(8,247)	0	0	(8,247)
Net earnings	$ 61,748	0	61,748	0
Common Stock, Dividends, Per Share, Cash Paid	$ 0
Net earnings	$ 107,866
Balance at beginning of period	1,902,695	1,354	2,058,680	(157,339)
Adjustment of DTA under ASU 2016-16	3,439	0	3,439	0
Balance at end of period	1,902,695	1,354	2,058,680	(157,339)
Repurchase of common stock	(24,998)	(7,218)	(17,780)	0
Common stock issued pursuant to stock-based compensation plans, net	1,704	1,704	0	0
Stock-based compensation	8,924	8,924	0	0
Dividends paid	(23,033)	0	(23,033)	0
Other Comprehensive Income (Loss), Net of Tax	3,889	0	0	3,889
Net earnings	46,118	0	46,118	0
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)
Balance at beginning of period	1,871,433	16,692	2,020,686	(165,945)
Balance at end of period	1,871,433	16,692	2,020,686	(165,945)
Repurchase of common stock	(150,000)	(23,371)	(126,629)	0
Common stock issued pursuant to stock-based compensation plans, net	580	580	0	0
Stock-based compensation	7,403	7,403	0	0
Dividends paid	(22,728)	0	(22,728)	0
Other Comprehensive Income (Loss), Net of Tax	(17,532)	0	0	(17,532)
Net earnings	$ 15,424	0	15,424	0
Common Stock, Dividends, Per Share, Cash Paid	$ 0
Net earnings	$ 76,681
Balance at beginning of period	1,704,580	1,304	1,886,753	(183,477)
Balance at end of period	1,704,580	1,304	1,886,753	(183,477)
Common stock issued pursuant to stock-based compensation plans, net	3,341	3,341	0	0
Stock-based compensation	12,815	12,815	0	0
Dividends paid	(22,278)	0	(22,278)	0
Other Comprehensive Income (Loss), Net of Tax	(2,332)	0	0	(2,332)
Net earnings	61,257	0	61,257	0
Balance at beginning of period	1,750,701	10,778	1,925,732	(185,809)
Balance at end of period	$ 1,750,701	$ 10,778	$ 1,925,732	$ (185,809)