Derivatives and Hedging (Tables)

12 Months Ended

Dec. 31, 2014

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of interest rate swaps and caps

As of December 31, 2014 and December 31, 2013, the Company had entered into the following interest rate swaps (in thousands): 

	Notional value at						Fair value at
Hedge type	December 31, 2014		December 31, 2013		Hedge interest rate	Maturity	December 31, 2014			December 31, 2013
Swap-cash flow	$	275,000	$	275,000	1.12%	November 2017	$	(232	)	$	3,161
Swap-cash flow	175,000		175,000		1.56%	March 2018	(2,182		)	(1,866		)
Swap-cash flow	175,000		175,000		1.64%	March 2018	(2,596		)	(2,406		)
Swap-cash flow	16,500		16,500		1.83%	September 2018	(315		)	(238		)
Swap-cash flow	16,500		16,500		1.75%	September 2018	(270		)	(181		)
Swap-cash flow	40,500		40,500		1.83%	September 2018	(772		)	(585		)
Swap-cash flow	41,500		41,500		1.75%	September 2018	(678		)	(456		)
Swap-cash flow	18,000		18,000		1.83%	September 2018	(343		)	(260		)
Swap-cash flow	17,000		17,000		1.75%	September 2018	(278		)	(187		)
Swap-cash flow	125,000		125,000		2.02%	March 2019	(3,073		)	(1,838		)
Swap-cash flow	100,000		100,000		1.94%	March 2019	(2,145		)	(1,085		)
Swap-cash flow	50,000		—		1.80%	October 2020	(242		)	—
Swap-cash flow	50,000		—		1.85%	October 2020	(387		)	—
Swap-cash flow	43,000		—		1.77%	October 2020	(131		)	—
	$	1,143,000	$	1,000,000			$	(13,644	)	$	(5,941	)