Quarterly report pursuant to Section 13 or 15(d)

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

v3.8.0.1
Derivative Financial Instruments (Gain (Loss) Recognized and Reclassified) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Amount of gain recognized in OCI on derivative $ 2,739 $ 722