CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock and Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Earnings (Loss)
Balance (in shares) at beginning of period at Dec. 31, 2016		136,334
Balance at beginning of period at Dec. 31, 2016	$ 1,678,326	$ 12,139	$ 1,832,138	$ (165,951)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings for the year	107,223		107,223
Common stock issued pursuant to stock-based compensation plans, net (in shares)		2,535
Common stock issued pursuant to stock-based compensation plans, net	47,510	$ 47,510
Stock-based compensation expense	31,513	$ 31,513
Dividends paid	(82,605)		(82,605)
Other comprehensive income (loss)	52,591			52,591
Balance (in shares) at end of period at Dec. 31, 2017		138,869
Balance at end of period at Dec. 31, 2017	1,834,558	$ 91,162	1,856,756	(113,360)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings for the year	282,425		282,425
Repurchase of common stock (in shares)		(4,986)
Repurchase of common stock	(243,706)	$ (136,891)	(106,815)
Common stock issued pursuant to stock-based compensation plans, net (in shares)		1,633
Common stock issued pursuant to stock-based compensation plans, net	12,896	$ 12,896
Stock-based compensation expense	34,188	$ 34,188
Dividends paid	(88,123)		(88,123)
Other comprehensive income (loss)	(35,732)			(35,732)
Balance (in shares) at end of period at Dec. 31, 2018		135,516
Balance at end of period at Dec. 31, 2018	1,876,786	$ 1,355	2,024,523	(149,092)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adoption of ASU 2014-09 and ASU 2016-16	80,280
Net earnings for the year	$ 171,597		171,597
Repurchase of common stock (in shares)	(2,500)	(2,549)
Repurchase of common stock	$ (124,998)	$ (37,819)	(87,179)
Common stock issued pursuant to stock-based compensation plans, net (in shares)		1,427
Common stock issued pursuant to stock-based compensation plans, net	16,425	$ 16,425
Stock-based compensation expense	36,731	$ 36,731
Dividends paid	(91,694)		(91,694)
Other comprehensive income (loss)	(16,853)			(16,853)
Balance (in shares) at end of period at Dec. 31, 2019		134,394
Balance at end of period at Dec. 31, 2019	1,871,433	$ 16,692	$ 2,020,686	$ (165,945)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adoption of ASU 2014-09 and ASU 2016-16	$ 3,439