Lease Accounting - Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Lessee, Lease, Description [Line Items]
Operating lease cost	$ 993	$ 639
Short-term lease cost	124	68
Variable lease cost	414	350
Total lease costs	1,633	1,876
Cost of operations, exclusive of depreciation and amortization
Lessee, Lease, Description [Line Items]
Operating lease cost	585	372
Short-term lease cost	109	67
Variable lease cost	104	17
Selling, general and administrative
Lessee, Lease, Description [Line Items]
Operating lease cost	408	267
Short-term lease cost	15	1
Variable lease cost	310	333
Depreciation and amortization
Lessee, Lease, Description [Line Items]
Finance Lease, Right-of-Use Asset, Amortization	$ 102	$ 819