Quarterly report pursuant to Section 13 or 15(d)

FAIR VALUE OF FINANCIAL INSTRUMENTS - Schedule of Fair Value Of Derivative Assets (Details)

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FAIR VALUE OF FINANCIAL INSTRUMENTS - Schedule of Fair Value Of Derivative Assets (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2017
Interest Rate Cap Agreements
Dec. 31, 2016
Interest Rate Cap Agreements
Dec. 31, 2015
Interest Rate Cap Agreements
Jun. 30, 2012
TotalInterestRateCapAgreementsMember
Dec. 31, 2017
Interest Rate Swap Agreements
Dec. 31, 2016
Interest Rate Swap Agreements
Dec. 31, 2015
Interest Rate Swap Agreements
Dec. 31, 2014
Interest Rate Swap Agreements
Jun. 30, 2012
TotalInterestRateSwapAgreementsMember
Weighted Average Month of Maturity Jan Jul Nov   Aug May May Nov  
Aggregate NotionalAmount $ 5,300 $ 77,905 $ 39,460 $ 122,665 $ 148,300 $ 165,132 $ 438,529 $ 14,898 $ 766,859
Weighted Average Fixed Pay Rate/Cap Rate 1.86% 2.66% 2.10%   5.28% 5.04% 5.42% 5.08%  
Aggregate Fair Value Asset/Liability $ 35 $ 354 $ 115 $ 504 $ (32,783) $ (17,121) $ (18,719) $ (1,603) $ (70,226)