Divestitures - Income Statement of Discontinued Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Service fee income	$ 3,254	$ 42,651
Income from discontinued operations before income taxes	(25,964)	34,894
Income tax expense, discontinued operations	0	2,049
Income from discontinued operations, net of income taxes	$ (25,964)	$ 32,845