Leases - Balance Sheet Line Items (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2020	Dec. 31, 2018
Assets
Operating lease assets	$ 4,445	$ 13,668
Finance lease assets	3,089	2,094
Total leased assets	7,534	15,762
Current
Finance	771	812
Noncurrent
Operating	15,898	11,239	$ 0
Finance	3,012	2,200
Total lease liabilities	23,853	17,334
ROU assets derecognized through restructuring	15,700
Finance lease accumulated amortization	1,900	(2,900)
Accrued Expenses And Other Current Liabilities
Current
Operating	$ 4,172	$ 3,083