Discontinued Operations (Results of Operations Associated with Discontinued Operations) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Discontinued Operations [Abstract]
Revenues	$ 153,107	$ 811,134	$ 382,496	$ 2,243,520
Income (loss) before income taxes	21,046	(16,938)	337	(34,233)
Income tax expense (benefit)	5,894	(3,682)	3,156	(6,944)
Income (loss) from discontinued operations	$ 15,152	$ (13,256)	$ (2,819)	$ (27,289)