Annual report pursuant to Section 13 and 15(d)

Derivative Financial Instruments - Gain (Loss) Recognized and Reclassified (Details)

v3.6.0.2
Derivative Financial Instruments - Gain (Loss) Recognized and Reclassified (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of Gain (Loss) Recognized in OCI on Derivative (Effective Portion) $ 4,609 $ (711) $ (2,028)