Commitments and Contingencies - Investments in Low Income Housing Partnerships, Net and Related Unfunded Commitments (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Investments in low-income housing partnerships	$ 8,028	$ 4,932
Unfunded commitments to fund investments for low-income housing partnerships	$ 5,020	$ 2,154

Amount of commitment or contingent commitments to qualified affordable housing project investments.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 740
-Section 50
-Paragraph 2
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=116633289&loc=SL49122993-202985

Name:	us-gaap_QualifiedAffordableHousingProjectInvestmentsCommitment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant