Leases - Lease-related Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
Operating lease liabilities:
Current lease liabilities included in Other accrued expenses	$ 863
Long-term lease liabilities	24,269	$ 18,143	$ 0
Total operating lease liabilities	25,132
Financing lease liabilities:
Current portion included in Current portion of long-term debt and finance lease obligations	391
Current portion included in Current portion of long-term debt and finance lease obligations			477
Long-term portion of lease liabilities included in Long-term debt and finance lease obligations, net of current portion	879
Long-term portion of lease liabilities included in Long-term debt and finance lease obligations, net of current portion			1,101
Total financing lease liabilities	1,270
Total financing lease liabilities			$ 1,578
Total lease liabilities	$ 26,402
Weighted-average remaining lease term:
Operating leases	25 years
Finance leases	4 years
Weighted-average discount rate:
Operating leases	4.72%
Finance leases	3.56%