Derivative and Other Fair Value Instruments - Summary of Effect of Fair Value Hedges on the Accompanying Consolidated Statements of Operations and Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain/(Loss) Recognized in Income on Derivative	$ (2,289)	$ (1,106)
Amount of Gain/(Loss) Recognized in Income on Hedged Item	2,289	1,106
Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain/(Loss) Recognized in Income on Derivative	(2,289)	(1,106)
Amount of Gain/(Loss) Recognized in Income on Hedged Item	$ 2,289	$ 1,106