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Securities - Carrying Value of Held-to-Maturity Investment Securities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Investments, Debt and Equity Securities [Abstract]
Amortized cost	$ 1,143,548	$ 942,314
Net loss on date of transfer from available-for-sale	(13,556)	(13,347)
Allowance for securities credit loss	(1,467)	(1,715)	$ 0
Accretion of net unrealized loss on securities reclassified as held-to-maturity	10,668	10,001
Carrying value	$ 1,139,193	$ 937,253

X

- Definition

Unrealized holding gain (loss) related to transfers of securities into held-to-maturity classification and out of the available-for-sale classification.

+ References

No definition available.

+ Details

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- Definition

Other comprehensive income reclassification of accretion of net unrealized losses to held to maturity securities.

+ References

No definition available.

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- Definition

Amount, excluding accrued interest, of allowance for credit loss on investment in debt security measured at amortized cost (held-to-maturity).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446

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- Definition

Amount excluding accrued interest, after allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446

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- Definition

Amount, before other-than-temporary impairment (OTTI) accretion, of investment in debt securities measured at amortized cost (held-to-maturity).

+ References

No definition available.

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- References

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