Fair Value Measures (Reconciliation of Instrument with Unobservable Inputs) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Fair Value, Assets (Liabilities), Net Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 58,646	$ 43,847
Unrealized gain (loss) included in other comprehensive income, net		8,731
Changes in fair value included in net loss		(10,302)
Fair value at purchase/issuance		147,591
Sale of CMBS acquired in the Cole Merger		(158,637)
Principal payments received/Return of principal received		(3,505)
Amortization included in net loss		277
Payment		314
Redemption of Series D		30,330
Ending balance		58,646
CMBS [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	58,646	60,583
Unrealized gain (loss) included in other comprehensive income, net	(977)	8,731
Fair value at purchase/issuance		151,197
Sale of CMBS acquired in the Cole Merger		(158,637)
Principal payments received/Return of principal received	(4,504)	(3,505)
Amortization included in net loss	139	277
Ending balance	53,304	58,646
Series D Preferred Stock Embedded Derivative [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	0	(16,736)
Changes in fair value included in net loss		(13,594)
Redemption of Series D		30,330
Ending balance		0
Contingent Consideration Arrangements [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 0	0
Changes in fair value included in net loss		3,292
Fair value at purchase/issuance		(3,606)
Payment		314
Ending balance		$ 0