Cumulative Other Comprehensive Income (Loss) - Schedule of Amounts Recognized in Cumulative Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2017
Amounts recognized in cumulative other comprehensive income (Loss) by component
Balance as of beginning of period	$ 1,235	$ (208)
Other comprehensive (loss) income before reclassifications	1,423	2,859
Amounts reclassified from cumulative other comprehensive income (loss) to net income	13	20
Net current period other comprehensive (loss) income	1,436	2,879
Balance as of end of period	2,671	2,671
Unrealized Loss on Derivative Instruments
Amounts recognized in cumulative other comprehensive income (Loss) by component
Balance as of beginning of period	(469)	(208)
Other comprehensive (loss) income before reclassifications	(32)	(300)
Amounts reclassified from cumulative other comprehensive income (loss) to net income	13	20
Net current period other comprehensive (loss) income	(19)	(280)
Balance as of end of period	(488)	(488)
Unrealized Gain on Marketable Securities
Amounts recognized in cumulative other comprehensive income (Loss) by component
Balance as of beginning of period	1,704	0
Other comprehensive (loss) income before reclassifications	1,455	3,159
Amounts reclassified from cumulative other comprehensive income (loss) to net income	0	0
Net current period other comprehensive (loss) income	1,455	3,159
Balance as of end of period	$ 3,159	$ 3,159