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, 2012		$ 49,190	$ 151,883	$ 1,261,377	$ (55,508)	$ (94,350)
Net earnings	$ 137,981			137,981
Other Comprehensive Income (Loss), Net of Tax	80,767				80,767
Dividends paid				(18,377)
Restricted Stock			(2,127)			5,796
Stock options exercised, net		0	(5,728)			34,451
Other			(330)			330
Share-based compensation			6,920			430
Ending 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			311			45,049
Other			(430)			430
Share-based compensation			8,266			234
Repurchase of common stock						(65,220)
Ending Balance at Dec. 31, 2014	1,478,433	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)