Interest Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Banking and Thrift, Interest [Abstract]
Interest on unpaid principal balance	$ 227,579	$ 172,472	$ 51,699
Interest on deposits	408	70	7
Amortization of net deferred origination costs	(32,939)	(27,267)	11,235
Total interest income	$ 195,048	$ 145,275	$ 62,941