Leases - Components of Lease Expense (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Lessee Lease Description [Line Items]
Total operating lease cost	$ 5,756
Finance lease cost
Total finance lease cost	45
Total lease cost	16,369
Inventory
Lessee Lease Description [Line Items]
Total operating lease cost	4,206
Finance lease cost
Variable lease cost	10,568
Operating Expenses
Lessee Lease Description [Line Items]
Total operating lease cost	1,550
Finance lease cost
Amortization of right-of-use assets	41
Other Income (Expense), Net
Finance lease cost
Interest on lease liabilities	$ 4