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, 2013		$ 49,190	$ 150,618	$ 1,380,981	$ 25,259	$ (53,343)
Net earnings	$ 113,338			113,338
Other Comprehensive Income (Loss), Net of Tax	(153,670)				(153,670)
Dividends paid				(25,013)
Restricted Stock			(722)			3,155
Stock options exercised, net		0	311			45,049
Other			(430)			430
Share-based compensation			8,266			234
Repurchase of common stock						(65,220)
Ending 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			(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	1,255,423	49,190	144,923	1,590,645	(225,928)	(303,407)
Net earnings	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)