Basis of Presentation and Significant Accounting Policies (Details 2) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Tax Treatment Of Dividend [Line Items]
Minimum Percentage of Taxable Income Distributed As Dividends		90.00%
Income Tax Expense Benefit Continuing Operations Income Tax Reconciliation [Line Items]
Deferred Tax Assets		$ 97,104	$ 94,100
Deferred tax assets allowance, reversed	$ 90,030	90,030	0	$ 0
Income Tax Liability Relating to Taxable REIT Subsidiaries Current		$ 8,322	$ 10,777	$ 9,608
Ordinary Income [Member]
Tax Treatment Of Dividend [Line Items]
Percentage Of Taxable Income Distributed		100.00%