Leases - Other Information Related to Leases (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Leases [Abstract]
Operating cash flows - operating leases	$ 39,774	$ 38,926
Operating cash flows from finance leases	47	83
Financing cash flows from finance leases	792	706	$ 0
Lease liabilities arising from new ROU assets, Operating leases	65,547	18,026
Lease liabilities arising from new ROU assets, Finance leases	$ 139	$ 308
Weighted Average remaining lease term, Operating leases	9 years 9 months 18 days	10 years 4 months 24 days
Weighted Average remaining lease term, Finance leases	3 years	2 years 9 months 18 days
Weighted Average Discount Rate, Operating leases	5.30%	5.70%
Weighted Average Discount Rate, Finance leases	3.90%	4.20%