Derivative and Hedging Activities - Summary of Amounts Recorded in AOCL (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Interest Expense        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Loss Reclassified from AOCL into Operations (Effective Portion) $ (305) $ (331) $ (621) $ (654)
General and Administrative Expense        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain or (Loss) Recognized in Operations on Derivative (Ineffective Portion) (1) (75) (3) (78) (3)
Cash Flow Hedging | Interest Rate Swap        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain or (Loss) Recognized in AOCL on Derivative (Effective Portion) $ 40 $ (875) $ (811) $ (1,277)