Leases - Supplemental Cash flow Information to operating leases (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Supplemental cash flow information
Cash paid for amounts included in the measurement of operating lease liabilities	$ 2,056	$ 2,143
Operating ROU assets obtained in exchange for lease liabilities	1,038
Supplemental balance sheet information
Operating lease ROU assets	33,672		$ 34,382
Operating lease liabilities:
Accrued expenses and other current liabilities	7,130		6,708
Operating lease liabilities	27,420		28,579
Total operating lease liabilities	$ 34,550		$ 35,287