Derivative Instruments and Hedging Activities - Fair Value of Derivative Instruments Designated as Hedging Instruments (Details) - Designated as Hedging Instrument - Interest rate swaps - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Derivatives, Fair Value [Line Items]
Derivative liability, notional amount	$ 215,000
Derivative liability, fair value	598	$ 0
Derivative asset, notional amount	215,000
Derivative asset, fair value	$ 0	$ 304