Derivative Instruments and Hedging Activities - Derivative Instruments Included in the Company's Accumulated Other Comprehensive Income (Details) - Cash Flow Hedging - Designated as Hedging Instrument - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accumulated other comprehensive income (loss) for derivative instruments:
Balance at beginning of the period	$ 1,135	$ 2,041	$ (1,744)
Balance at end of the period	304	1,135	2,041
Interest Rate Swap
Accumulated other comprehensive income (loss) for derivative instruments:
Unrealized (loss) gain on interest rate swaps	$ (831)	$ (906)	$ 3,785