Leases - Operating Lease Expense, Operating Lease Cash Flows and Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Lessee, Lease, Description [Line Items]
Operating lease expense	$ 1,388	$ 1,976
Operating cash outflows from operating leases	1,525	1,767
Operating lease right-of-use assets obtained in exchange for lease obligations	186	1,524
Cost of sales
Lessee, Lease, Description [Line Items]
Operating lease expense	390	592
Selling, general and administrative expenses
Lessee, Lease, Description [Line Items]
Operating lease expense	$ 998	$ 1,384