Income Taxes (Schedule Of Provision For Income Tax Benefit (Expense) (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Income Tax Expense Benefit [Abstract]
Total current benefit (expense)	$ (23,309)	$ 7,492	$ (63,694)	$ (35,587)
Total deferred benefit	1,232	(6,871)	(14,988)	(32,179)
Income tax benefit (expense)	$ (22,077)	$ 621	$ (78,682)	$ (67,766)