Leases - Supplemental Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Supplemental Cash Flows Information:
Operating cash flows from operating leases	$ 6,878	$ 6,676	$ 13,688	$ 13,394
Operating cash flows from finance leases	108	51	217	100
Financing cash flows from finance leases	331	212	661	412
ROU assets obtained in exchange for lease obligations:
Operating leases	16,558	1,901	19,571	5,685
Finance leases	$ 0	$ 0	$ 89	$ 440
Weighted-average remaining lease term (in years):
Operating leases	7 years		7 years		4 years 8 months 12 days
Finance leases	12 years 1 month 6 days		12 years 1 month 6 days		12 years 6 months
Weighted-average discount rate:
Operating leases	3.10%		3.10%		3.40%
Finance leases	2.80%		2.80%		2.80%