Quarterly report pursuant to Section 13 or 15(d)

FAIR VALUE MEASUREMENTS - Interest Swap Derivatives (Details)

v3.7.0.1
FAIR VALUE MEASUREMENTS - Interest Swap Derivatives (Details) - Interest Rate Swap [Member] - Level 2 [Member] - Designated as Hedging Instrument [Member] - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis [Roll Forward]    
Fair value at beginning of period $ 8,159 $ (972)
Swap ineffectiveness 6 7
Losses on interest rate swaps reclassified into interest expense from accumulated other comprehensive loss 1,530 909
Unrealized losses on interest rate swaps included in accumulated other comprehensive loss (2,239) (8,437)
Fair value of end of period $ 7,456 $ (8,493)