Leases - Supplemental Lease Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Jan. 01, 2019
Leases [Abstract]
ROU assets obtained in exchange for new operating lease obligations	$ 8,990	$ 123,477
ROU assets obtained in exchange for new finance lease obligations	3,276	5,299
Operating leases - operating cash flows	17,396	14,874
Finance leases - operating cash flows	419	295
Finance leases - financing cash flows	$ 3,114	$ 1,898
Weighted-average remaining lease term, operating leases (years)	7 years 1 month 6 days	8 years 1 month 6 days
Weighted-average remaining lease term, finance leases (years)	2 years 6 months	3 years 1 month 6 days
Weighted-average discount rate, operating leases (percentage)	5.00%	5.30%
Weighted-average discount rate, finance leases (percentage)	4.60%	4.70%
Existing ROU Assets			$ 89,100