Quarterly report pursuant to Section 13 or 15(d)

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

v3.7.0.1
Derivative Financial Instruments (Gain (Loss) Recognized and Reclassified) (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] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member]        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of gain (loss) recognized in OCI on derivative $ (544) $ (2,443) $ 178 $ (3,829)