Derivative and Hedging Activities - Derivative Instruments Amounts Recorded in AOCL and Gain or (Loss) Reclassified Out of AOCL (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Interest Expense
       
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Loss Reclassified from AOCL into Operations (Effective Portion) $ (333) $ (120) $ (987) $ (309)
General and Administrative Expense
       
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Loss Reclassified from AOCL into Operations (Effective Portion) 0 0 0 (22)
Amount of Gain or (Loss) Recognized in Operations on Derivative (Ineffective Portion) 5 (22) 2 32
Cash Flow Hedging | Interest Rate Swap
       
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain or (Loss) Recognized in AOCL on Derivative (Effective Portion) $ 237 $ (320) $ (1,040) $ 149