Leases (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Components of operating leases [Abstract]
Operating lease cost		$ 395	$ 565	$ 1,357	$ 1,692
Variable lease cost		16	43	52	115
Short-term lease cost		10	4	26	14
Total		421	612	1,435	1,821
Supplemental balance sheet information related to operating leases [Abstract]
Lease right of use asset	[1]	$ 6,713	8,282	$ 6,713	8,282
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]		us-gaap:OtherAssets		us-gaap:OtherAssets
Lease liabilities	[2]	$ 6,945	$ 8,304	$ 6,945	$ 8,304
Operating Lease, Liability, Statement of Financial Position [Extensible List]		us-gaap:OtherLiabilities		us-gaap:OtherLiabilities
Weighted average remaining lease term (years)		6 years 10 months 2 days	7 years 5 months 19 days	6 years 10 months 2 days	7 years 5 months 19 days
Weighted average discount rate		2.60%	2.80%	2.60%	2.80%
Maturities of lease liabilities [Abstract]
Three months ending December 31, 2020		$ 408		$ 408
2021		1,505		1,505
2022		1,324		1,324
2023		1,101		1,101
2024		692		692
2025 and thereafter		2,576		2,576
Total lease payments		7,606		7,606
Less imputed interest		(661)		(661)
Total	[2]	$ 6,945	$ 8,304	$ 6,945	$ 8,304

[1] Included in Accrued income and other assets in our Condensed Consolidated Statements of Financial Condition.

[2] Included in Accrued expenses and other liabilities in our Condensed Consolidated Statements of Financial Condition.