STATEMENT OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock Member	Additional Paid In Capital Member	Retained Earnings Member	Accumulated Other Comprehensive Income Member	Treasury Stock Member
Beginning Balance at Dec. 31, 2014		$ 49,190	$ 158,043	$ 1,469,306	$ (128,411)	$ (69,695)
Net earnings	$ 145,461			145,461
Other Comprehensive Income (Loss), Net of Tax	(97,517)				(97,517)
Dividends paid				(24,122)
Restricted Stock			(10,303)			13,734
Stock options exercised, net		0	(11,349)			45,743
Other			(647)			647
Share-based compensation			9,179			294
Repurchase of common stock						(294,130)
Ending Balance at Dec. 31, 2015		49,190	144,923	1,590,645	(225,928)	(303,407)
Net earnings	187,329			187,329
Other Comprehensive Income (Loss), Net of Tax	(65,828)				(65,828)
Dividends paid				(23,067)
Restricted Stock			(12,086)			17,275
Stock options exercised, net			(11,271)			39,483
Other		(3)	(1,104)			811
Share-based compensation			9,021			457
Repurchase of common stock						(105,249)
Ending Balance at Dec. 31, 2016	1,291,191	49,187	129,483	1,754,907	(291,756)	(350,630)
Net earnings	214,891
Other Comprehensive Income (Loss), Net of Tax	74,916				74,916
Dividends paid				(24,740)
Restricted Stock			(12,104)			12,105
Stock options exercised, net			(5,724)			19,902
Other			(2,237)	(734)		889
Share-based compensation			11,191			381
Repurchase of common stock						(52,127)
Ending Balance at Dec. 31, 2017	$ 1,527,800	$ 49,187	$ 120,609	$ 1,944,324	$ (216,840)	$ (369,480)