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Shareholders' Equity (Details) - USD ($) $ / shares in Units, $ in Millions |  |  | 3 Months Ended |
--- | --- | --- | --- | ---
Aug. 20, 2021 | Jul. 22, 2021 | Mar. 31, 2022 | Mar. 31, 2021 | Dec. 31, 2021
Business Acquisition Equity Interests Issued Or Issuable [Line Items] |  |  |  |  |
Number of shares authorized to be repurchased |  |  | 10,800,000 |  |
Purchase of treasury stock |  |  |  | $ 12.7 |
Treasury stock acquired, Shares, |  |  |  | 200,000 |
Treasury Stock Acquired, Average Cost Per Share |  |  | $ 61.91 |  |
Preferred stock, par value |  |  | $ 1.00 | $ 1.00 | $ 1
Non-cumulative Perpetual Series D Preferred Stock [Member] |  |  |  |  |
Business Acquisition Equity Interests Issued Or Issuable [Line Items] |  |  |  |  |
Stock Dividend |  | 4.50% |  |  |
Preferred stock, par value |  | $ 1.00 |  |  |
Preferred stock liquidation preference per depositary share |  | 25 |  |  |
Preferred stock, liquidation preference per share |  | $ 25,000 |  |  |
Preferred stock, redemption terms |  |  | The Company may redeem the Series D preferred stock at its option, subject to regulatory approval, on or after August 15, 2026. |  |
Underwritten registered public offering |  | $ 300.0 |  |  |
Non-cumulative Perpetual Series A Preferred Stock [Member] |  |  |  |  |
Business Acquisition Equity Interests Issued Or Issuable [Line Items] |  |  |  |  |
Stock Dividend | 6.25% |  |  |  |
Preferred stock redemption price per depositary share | $ 25.00 |  |  |  |
Business Bancshares, Inc. [Member] |  |  |  |  |
Business Acquisition Equity Interests Issued Or Issuable [Line Items] |  |  |  |  |
Issuance of common stock |  |  | 2,100,000 |  |

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- Definition The per share liquidation preference (or restrictions) of nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) that has a preference in involuntary liquidation considerably in excess of the par or stated value of the shares. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(d)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=123467817&loc=d3e21475-112644 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496158-112644 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=123467817&loc=d3e21484-112644 + Details
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