Commitments and Contingencies - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Other Commitments [Line Items]
Mortgage loans repurchased	$ 0	$ 0	$ 0
GP 275 Owner LLC
Other Commitments [Line Items]
Lease term				10 years
Rent expense	200,000	$ 200,000
Escrow deposit	$ 200,000
Vanderbilt Associates I, LLC
Other Commitments [Line Items]
Rent expense			$ 100,000