Discontinued Operations (Summarized Income (Loss) from Discontinued Operations, Net Of Tax) (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Discontinued Operation, Additional Disclosures [Abstract]
Operating revenues									$ 382,705	$ 597,425	$ 723,605
Operating costs and expenses									(465,605)	(639,315)	(769,129)
Loss from discontinued operations									(82,900)	(41,890)	(45,524)
Benefit from income taxes									(29,059)	(13,668)	(10,934)
Net Loss from Discontinued Operations									(53,841)	(28,222)	(34,590)
Gain on sales and disposition of discontinued operations									157,449	23,759	2,975
Provision (benefit) for income taxes on sales and disposition of discontinued operations									57,489	(64,591)	2,616
Income (Loss) from Discontinued Operations, Net of Tax	$ 100,835	$ (25,872)	$ (7,620)	$ (21,224)	$ 5,600	$ 37,539	$ 10,264	$ 6,725	$ 46,119	$ 60,128	$ (34,231)