Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Offsetting Assets [Line Items]
Unrealized loss on interest rate swap	$ (3,379)	$ 0	$ (3,379)	$ 0
Operating lease right-of-use asset	5,692		5,692		$ 0
Operating lease liabilities, current	2,045		2,045		0
Operating lease liabilities, noncurrent	$ 3,985		$ 3,985		$ 0