Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 4,653	$ 4,374	$ 13,126	$ 19,783
Other comprehensive income/(loss):
Unrealized derivative gain/(loss) on cash flow hedges	561	(73)	429	81
Total other comprehensive income/(loss):	561	(73)	429	81
Total comprehensive income	$ 5,214	$ 4,301	$ 13,555	$ 19,864