Leases - Balance Sheet Classification (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Jan. 01, 2019
Leases [Abstract]
Operating lease assets	$ 30,969	$ 32,009	$ 28,000
Finance lease assets	942	1,135
Total lease assets	31,911	33,144
Current operating lease liabilities	6,888	6,105
Current finance lease liabilities	353	287
Noncurrent operating lease liabilities	25,068	26,946
Noncurrent finance lease liabilities	590	829
Total lease liabilities	$ 32,899	$ 34,167
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:AccruedLiabilitiesCurrent	us-gaap:AccruedLiabilitiesCurrent
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:LongTermDebtNoncurrent	us-gaap:LongTermDebtNoncurrent
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:ShortTermBorrowings	us-gaap:ShortTermBorrowings