Leases - Balance Sheet Classification of Lease Assets and Liabilities (Details) $ in Thousands	Sep. 30, 2019 USD ($)
Leases [Abstract]
Operating lease assets	$ 127,746
Finance lease assets	252
Total lease assets	127,998
Current operating lease liabilities	14,543
Noncurrent operating lease liabilities	127,646
Noncurrent finance lease liabilities	284
Total lease liabilities	$ 142,473
Weighted-average remaining lease term (years) - operating leases	8 years 10 months 24 days
Weighted-average discount rate - operating leases	5.10%