Income Taxes (Components Of Provision For Income Taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Current, Federal	$ 93,853	$ 80,620	$ 69,268
Current, State	7,733	7,192	7,197
Current, Foreign	17,854	24,495	24,722
Deferred, Federal	(14,472)	(18,536)	(23,438)
Deferred, State	(1,987)	(1,915)	(2,187)
Deferred, Foreign	1,263	1,593	1,600
Total	$ 104,244	$ 93,449	$ 77,162