Discontinued Operations - Revenue and Loss from Discontinued Operations (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Discontinued Operations and Disposal Groups [Abstract]
Revenue and other income	$ 0	$ 18,316	$ 31,985	$ 55,335
Loss from operations of discontinued operations before income taxes	0	(4,163)	(6,252)	(6,253)
Income tax expense	0	(2,993)	(1,458)	(4,791)
Loss from operations of discontinued operations	0	(7,156)	(7,710)	(11,044)
Loss on sale before income taxes	0	0	(18,235)	0
Income tax expense	0	0	(1,045)	0
Loss on sale	0	0	(19,280)	0
Loss from discontinued operations, net of income taxes	$ 0	$ (7,156)	$ (26,990)	$ (11,044)