Derivative and Hedging Activities - Summary of Amounts Recorded in AOCL (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Interest Expense    
Derivative Instruments, Gain (Loss) [Line Items]    
Amount of Loss Reclassified from AOCL into Operations (Effective Portion) $ (317) $ (323)
General and Administrative Expense    
Derivative Instruments, Gain (Loss) [Line Items]    
Amount of Loss Recognized in Operations on Derivative (Ineffective Portion) (4) 0
Cash Flow Hedging | Interest Rate Swap    
Derivative Instruments, Gain (Loss) [Line Items]    
Amount of Loss Recognized in AOCL on Derivative (Effective Portion) $ (852) $ (402)