Discontinued Operations (Summarized (Loss) Income from Discontinued Operations, Net Of Tax) (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended					12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2013	Dec. 31, 2012
Discontinued Operation, Additional Disclosures [Abstract]
Operating revenues	$ 16,274				$ 141,974
Operating costs and expenses	(10,134)				(168,077)
Income (loss) from discontinued operations	6,140				(26,103)
Expense (benefit) from income taxes	2,026				(9,176)
Net Income (Loss) from Discontinued Operations	4,114				(16,927)
Loss on sales of discontinued operations	(4,737)				(70)
Benefit from income taxes on sales of discontinued operations	(1,695)				(24)
Income (Loss) from Discontinued Operations, Net of Tax	$ 1,072	$ 106,142	$ (23,515)	$ (1,951)	$ (16,973)	$ 63,703	$ 79,839