Leases - Balance Sheet Information (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019
Operating Leases
Operating lease right-of-use assets	$ 25,771	$ 23,901	$ 23,901
Current portion of operating lease liabilities included in Other accrued liabilities	8,358	7,722	7,722
Operating lease liabilities	17,810	16,656	16,656
Total operating lease liabilities	26,168		24,378
Finance Leases
Property, plant and equipment, at cost	13,163		14,058
Accumulated depreciation	(3,634)		(1,888)
Property, plant and equipment, net	9,529		12,170
Current installments of finance lease obligations	5,114	6,758	5,540
Finance lease obligations	526	717	4,886
Total finance lease obligations	$ 5,640	$ 7,475	$ 10,426