Leases - Narratives (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($) lease	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Lease Description
Number of non-cancelable operating leases, lessee (leases) | lease	13
Operating lease payments	$ 9,900	$ 9,300	$ 8,300
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:OtherAssets	us-gaap:OtherAssets
Operating Lease, Liability, Statement of Financial Position [Extensible List]	us-gaap:AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent	us-gaap:AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent
Right of use asset	$ 15,700	$ 15,100
Operating lease liability	$ 16,394	$ 16,200
Weighted average operating lease term	8 years	7 years
Operating lease weighted average interest rate (percent)	4.00%	4.40%
Minimum
Lease Description
Lessor operating lease term	1 month
Maximum
Lease Description
Lessor operating lease term	6 months