Leases - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows paid for operating leases	$ 5,405	$ 5,181
Operating cash flows paid for interest portion of finance leases	48	49
Financing cash flows paid for principal portion of finance leases	195	152
Right-of-use assets obtained in exchange for lease obligations
Operating leases	299	280
Finance leases	$ 11	$ 536