Leases - Finance and Operating Lease Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Finance lease cost
Amortization of right-of-use assets	$ 1,272	$ 1,229
Interest expense	192	226
Operating lease cost	8,396	9,108
Short-term lease cost	591	479
Variable lease cost	1	1
Total lease cost	10,452	11,043
Assets
Operating lease right-of-use assets	50,264	45,452
Property, plant and equipment, net	14,644	13,267
Lease, Right-Of-Use Asset	$ 64,908	$ 58,719
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization
Current liabilities:
Current portion of operating lease liabilities	$ 4,797	$ 4,288
Other current liabilities	$ 4,252	$ 2,701
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesCurrent	us-gaap:OtherLiabilitiesCurrent
Non-current liabilities:
Operating lease liabilities, net of current portion	$ 55,053	$ 48,575
Other non-current liabilities	6,858	7,911
Total lease liabilities	$ 70,960	$ 63,475
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesNoncurrent	us-gaap:OtherLiabilitiesNoncurrent