INCOME TAXES (Schedule Of Provision For Income Taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Current:
Federal	$ 6,644	$ 13,700	$ 46,665
State	1,233	2,503	2,301
Foreign	6,069	6,113	5,205
Total current	13,946	22,316	54,171
Deferred:
Federal	(66,466)	(3,400)	1,282
State	(758)	(1,751)	(394)
Foreign	(80)	(1,323)	(1,239)
Total deferred	(67,304)	(6,474)	(351)
Provision for income taxes	$ (53,358)	$ 15,842	$ 53,820