Schedule IV - Movement in Mortgage Loans on Real Estate (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Mortgage Loans on Real Estate [Abstract]
Beginning Balance	$ 26,806	$ 26,279	$ 26,457
Additions during the year:
Acquired in Cole Merger	0	72,326	0
Investments in mortgage notes	0	2,952	0
Deductions during the year:
Principal payments received on loan investments	(2,417)	(74,109)	(164)
Amortization of unearned discounts and premiums	(151)	(642)	(14)
Ending Balance	$ 24,238	$ 26,806	$ 26,279