XML 74 R60.htm IDEA: XBRL DOCUMENT v3.7.0.1
Derivatives and Hedging Activities Derivatives Not Designated as Hedging Instruments (Details) - USD ($)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Interest rate swaps | Derivative not designated as hedging instrument      
Derivative Instruments, Gain (Loss) [Line Items]      
Derivative, loss on derivative, net $ (78,000) $ (176,000) $ (350,000)