Leases - Classification of Leases (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Jan. 01, 2019
Assets:
Operating lease assets, net of accumulated amortization	$ 100,671	$ 99,800
Finance lease assets, net of accumulated depreciation	4,748
Total lease assets	105,419
Liabilities:
Operating lease liabilities	112,260	$ 99,800
Finance lease liabilities	4,330
Total lease liabilities	$ 116,590