Leases - Lease Portfolio (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Jan. 01, 2019
Lease Cost
Operating lease cost	$ 7,208
Short-term lease cost	127
Variable lease cost	1,976
Sublease income	(908)
Total lease cost	8,403
Operating Leases
Operating lease, right-of-use-asset	46,559	$ 1,751
Operating lease liabilities	10,540	616
Operating lease liabilities, net of current portion	$ 36,867	$ 1,226
Weighted average remaining lease term - operating leases	7 years 5 months 19 days
Weighted-average discount rate - operating leases	7.58%