XML 104 R91.htm IDEA: XBRL DOCUMENT v3.3.1.900
Schedule III - Real Estate and Accumulated Depreciation Reconciliation of Accumulated Depreciation (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]      
Balance, beginning of year $ 377,552 $ 295,351 $ 257,091
Depreciation expense 108,319 89,505 49,947
Disposals (20,287) (7,304) (11,687)
Balance, end of year $ 465,584 $ 377,552 $ 295,351