Investments - Other Investment Disclosures (Details) - USD ($)	Mar. 31, 2021	Dec. 31, 2020
Investments [Abstract]
Other investments with unrealized losses	$ 0	$ 0
Investments in low income housing projects	$ 74,000,000.0	$ 75,700,000

Amount of investment in qualified affordable housing projects.

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 (b)
-URI http://asc.fasb.org/extlink&oid=116633289&loc=SL49122993-202985

Name:	us-gaap_AmortizationMethodQualifiedAffordableHousingProjectInvestments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant