Income Taxes (Provision For Income Taxes) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current:
Federal	$ 46,735	$ 86,053	$ 103,332
State	14,692	14,809	17,972
Non - U.S.	10,307
Current income tax expense (benefit), total	71,734	100,862	121,304
Deferred:
Federal	47,403	(117,549)	27,646
State	3,536	(14,905)	3,385
Non - U.S.	(8,629)
Deferred income tax expense (benefit), total	42,310	(132,454)	31,031
Provision for income taxes	$ 114,044	$ (31,592)	$ 152,335