Derivative and Hedging Activities - Summary of Amounts Recorded in AOCL (Narrative) (Details) - USD ($)
1 Months Ended 9 Months Ended
Jun. 30, 2016
Sep. 30, 2016
Sep. 30, 2015
Derivative Instruments, Gain (Loss) [Line Items]      
Derivative instruments loss estimated to be reclassified from AOCL as an increase to interest expense within 12 months   $ 8,000  
Interest Rate Swaps      
Derivative Instruments, Gain (Loss) [Line Items]      
Loss on termination of swaps $ 1,700,000   $ 76,000