Leases - Narrative (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Jan. 01, 2019
Lessee, Lease, Description [Line Items]
Operating lease assets	$ 144,755	$ 142,219
Operating lease liabilities	153,344
Finance leases, gross	17,400	15,900
Finance leases, accumulated depreciation	$ 10,200	$ 8,000
Revision of Prior Period, Accounting Standards Update, Adjustment
Lessee, Lease, Description [Line Items]
Operating lease assets			$ 197,000
Operating lease liabilities			$ 201,000