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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Debt Securities, Held-to-maturity, Fair Value	$ 69,845	$ 76,485
Debt Securities, Available-for-sale, Amortized Cost	$ 3,526,096	$ 3,827,418
Common Stock, No Par Value	$ 0	$ 0
Common Stock, Shares Authorized	160,000,000	160,000,000
Common Stock, Shares, Issued	104,281,794	104,281,794
Treasury Stock, Common, Shares	9,164,614	9,390,695

X

- Definition

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
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Face amount per share of no-par value common stock.

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The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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Fair value of investment in debt security measured at amortized cost (held-to-maturity).

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Number of previously issued common shares repurchased by the issuing entity and held in treasury.

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