Leases - Operating Lease Expense, Operating lease Cash Flows and Supplemental Cash flow Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Operating lease expense	$ 6,334
Operating cash outflows from operating leases	6,617
Operating lease right-of-use assets obtained in exchange for lease obligations	4,302
Cost of sales
Lessee, Lease, Description [Line Items]
Operating lease expense	1,945
Selling, general and administrative expenses
Lessee, Lease, Description [Line Items]
Operating lease expense	$ 4,389