Leases - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows paid for operating leases	$ 3,731	$ 4,105
Operating cash flows paid for interest portion of finance leases	26	37
Financing cash flows paid for principal portion of finance leases	144	145
Right-of-use assets obtained in exchange for lease obligations
Operating leases	9	299
Finance leases	$ 0	$ 11