Fair Value Measures (Fair Value of Assets and Liabilities, Measured on a Recurring Basis) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Assets:
Derivative assets	$ 0	$ 1,892
Liabilities:
Derivative liabilities	(15,241)	(6,922)
Fair Value, Measurements, Recurring [Member]
Assets:
CMBS	48,347	53,304
Derivative assets		1,892
Total assets		55,196
Liabilities:
Derivative liabilities	(15,241)	(6,922)
Fair Value, Measurements, Recurring [Member] | Level 1 [Member]
Assets:
CMBS	0	0
Derivative assets		0
Total assets		0
Liabilities:
Derivative liabilities	0	0
Fair Value, Measurements, Recurring [Member] | Level 2 [Member]
Assets:
CMBS	0	0
Derivative assets		1,892
Total assets		1,892
Liabilities:
Derivative liabilities	(15,241)	(6,922)
Fair Value, Measurements, Recurring [Member] | Level 3 [Member]
Assets:
CMBS	48,347	53,304
Derivative assets		0
Total assets		53,304
Liabilities:
Derivative liabilities	$ 0	$ 0