Annual report pursuant to Section 13 and 15(d)

INVESTMENTS IN REAL ESTATE, NET OF ACCUMULATED DEPRECIATION - Rollforward of Investments in Other Real Estate 2 (Details)

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INVESTMENTS IN REAL ESTATE, NET OF ACCUMULATED DEPRECIATION - Rollforward of Investments in Other Real Estate 2 (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Gross Carrying Amount      
Balance at beginning of year $ 276,119 $ 263,103 $ 250,208
Additions:      
Acquisitions of real estate 0 0 0
Improvements 20,982 14,970 15,109
Disposals:      
Disposal of long-lived assets (5,500) (1,954) (2,214)
Impairments (7,196) 0 0
Transferred to assets held-for-sale (2,058) 0 0
Balance at end of year 282,347 276,119 263,103
Accumulated Depreciation      
Balance at beginning of year (48,212) (23,820) 0
Additions:      
Depreciation expense (23,351) (24,943) (24,740)
Disposals:      
Disposal of long-lived assets 5,319 551 920
Impairments 1,443 0 0
Transferred to assets held-for-sale 65 0 0
Balance at end of year $ (64,736) $ (48,212) $ (23,820)