Leases - Operating Lease Expense, Operating Lease Cash Flows and Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Lessee, Lease, Description [Line Items]
Total operating lease expense	$ 1,706	$ 1,388
Operating cash outflows from operating leases	1,798	1,525
Operating lease right-of-use assets obtained in exchange for lease obligations	294	186
Non-cash release of operating lease obligations	654	0
Cost of sales
Lessee, Lease, Description [Line Items]
Total operating lease expense	670	390
Selling, general and administrative expenses
Lessee, Lease, Description [Line Items]
Total operating lease expense	$ 1,036	$ 998