Quarterly report pursuant to Section 13 or 15(d)

Derivative Instruments - Schedule of Gains (Losses) on Derivatives (Details)

v3.7.0.1
Derivative Instruments - Schedule of Gains (Losses) on Derivatives (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Interest Rate Swap [Member]        
Derivative Instruments, Gain (Loss) [Line Items]        
Unrealized loss on interest rate hedges $ (1,489) $ (1,384) $ (754) $ (5,059)