Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended							12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Minimum distribution requirement of its real estate investment trust taxable income to its shareholders (in hundredths)								90.00%
Net operating losses (income)								$ 82,393	$ 67,909	$ 44,690
Total income tax expense	$ (2,401)	$ (631)	$ (109)	$ (1,879)	$ (699)	$ 1	$ (108)	(3,141)	(2,685)	$ (5,600)
Valuation allowance	804			$ 804				804	$ 804
Tax Credits								558
Federal [Member]
Segment Reporting Information [Line Items]
Net operating loss carryforwards	35,353							35,353
State [Member]
Segment Reporting Information [Line Items]
Net operating loss carryforwards	$ 40,546							$ 40,546