Leases - Supplemental Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Supplemental cash flows information:
Operating cash flows from operating leases	$ 7,339	$ 5,757	$ 20,733	$ 19,515
Operating cash flows from finance leases	70	46	170	30
Financing cash flows from finance leases	253	190	665	116
ROU assets obtained in exchange for lease obligations:
Operating leases	1,806	5,532	7,491	11,546
Finance leases	$ 9,056	$ 1,065	$ 9,496	$ 6,369
Weighted-average remaining lease term (in years):
Operating leases	4 years 9 months 18 days		4 years 9 months 18 days		5 years 1 month 6 days
Finance leases	12 years 10 months 24 days		12 years 10 months 24 days		6 years 8 months 12 days
Weighted-average discount rate:
Operating leases	3.40%		3.40%		3.60%
Finance leases	2.80%		2.80%		2.80%