Fair Value of Assets and Liabilities - Schedule of Assets and Liabilities Measure at Fair Value (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014
Recurring Fair Value Measurements:
Derivative liability		$ (9,300)	$ (6,700)
Recurring
Recurring Fair Value Measurements:
Effective portion of interest rate swap contracts	$ (5,963)
Derivative liability	(8,919)
Recurring | Level 1
Recurring Fair Value Measurements:
Effective portion of interest rate swap contracts	0
Derivative liability	0
Recurring | Level 2
Recurring Fair Value Measurements:
Effective portion of interest rate swap contracts	(5,963)
Derivative liability	0
Recurring | Level 3
Recurring Fair Value Measurements:
Effective portion of interest rate swap contracts	0
Derivative liability	$ (8,919)