SCHEDULE III - REAL ESTATE AND ACCUMULATED DEPRECIATION Reconciliation of Accumulated Depreciation (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance at beginning of year	$ 229,538	$ 169,718	$ 147,626
Depreciation related to real estate	26,477	31,732	22,092
Consolidation of Previously Unconsolidated Investments	0	28,088	0
Balance at end of year	$ 256,015	$ 229,538	$ 169,718