Leases - Balance Sheet Classification of Lease Assets and Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Leases [Abstract]
Operating lease assets	$ 155,523	$ 155,633
Finance lease assets	286	309
Total lease assets	155,809	155,942
Current operating lease liabilities	17,658	16,755
Noncurrent operating lease liabilities	154,501	152,920
Noncurrent finance lease liabilities	298	333
Total lease liabilities	$ 172,457	$ 170,008
Weighted-average remaining lease term (years) - operating leases	8 years 8 months 12 days
Weighted-average discount rate - operating leases	5.00%