Leases - Assets and Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Leases [Abstract]
Operating lease right-of-use assets, net of amortization	$ 19,602	$ 0
Financing lease right-of-use assets, net of amortization	7,683	0
Total assets	27,285
Current portion of operating lease liabilities	5,408	0
Current portion of financing lease liabilities	2,909	0
Total current	8,317
Operating lease liabilities	14,817	0
Financing lease liabilities	3,609	$ 0
Total noncurrent	18,426
Total liabilities	26,743
Operating lease, right-of-use asset, accumulated amortization	4,100
Finance lease, right-of-use asset, accumulated amortization	$ 5,600