Securities - Narrative (Details)	3 Months Ended
Mar. 31, 2022 USD ($)
Debt and Equity Securities, FV-NI [Line Items]
Accrued interest	$ 6,000,000
Unrealized Gain (Loss)	0
Allowance for Credit Loss	0
Mutual Fund [Member]
Debt and Equity Securities, FV-NI [Line Items]
Equity securities	2,000,000
Private Equity Funds [Member]
Debt and Equity Securities, FV-NI [Line Items]
Equity securities	$ 1,000

Amount, after allowance for credit loss, of accrued interest on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 50
-Paragraph 3A
-URI http://asc.fasb.org/extlink&oid=124269663&loc=SL120267853-210455

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2A
-URI http://asc.fasb.org/extlink&oid=123581744&loc=SL121698322-111563

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 30
-Section 50
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-URI http://asc.fasb.org/extlink&oid=124269663&loc=SL120267856-210455

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Amount of allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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-SubTopic 30
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-Paragraph 9
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-Section 50
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Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as current.

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