v3.3.1.900
Schedule III - Real Estate and Accumulated Depreciation (Details 3) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2012
Dec. 31, 2015
Dec. 31, 2013
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]      
Accumulated depreciation, beginning of year     $ 818,957
Depreciation of real estate $ 145,325 $ 159,524 153,841
SEC Schedule III, Real Estate Accumulated Depreciation, Period Increase 145,325 159,524 153,841
Write-offs due to sale (17,144) (66,603) (18,111)
Properties held for sale (63,110) (46,191) (7,007)
Other [1] (2,629) (153) (16)
Total deductions during period (82,883) $ (112,947) (25,134)
Accumulated depreciation, end of year $ 818,957   $ 947,664
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