Income Taxes (Net Deferred Tax Liabilities Classified In The Consolidated Balance Sheet) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Deferred Tax Liabilities, Net, Classification [Abstract]
Noncurrent deferred income taxes	$ (383,069)	$ (670,858)
Net deferred tax liability	$ (383,069)	$ (670,858)