Leases - Classification of Leases (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Assets:
Operating lease assets, net of accumulated amortization	$ 106,479	$ 99,028
Finance lease assets, net of accumulated depreciation	3,065	4,312
Total lease assets	109,544	103,340
Liabilities:
Operating lease liabilities	119,089	113,843
Finance lease liabilities	1,911	3,716
Total lease liabilities	$ 121,000	$ 117,559