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Shareholders' Equity - Preferred Stock and Dividends Paid Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020
Capital Unit [Line Items] |  |
Preferred stock, shares issued | 5,700,000 | 9,000,000
Preferred stock, carrying value | $ 137,794 | $ 217,471
Fixed-to-Floating Rate Non-Cumulative Perpetual Preferred Stock, Series C, par value $1.00 per share |  |
Capital Unit [Line Items] |  |
Preferred stock, shares issued | 0 | 2,300,000
Preferred stock, carrying value | $ 0 | $ 55,569
Preferred stock, fixed dividend rate | 7.00% |
Preferred stock, dividends paid (usd per share) | $ 1.04 |
Fixed-to-Floating Rate Non-Cumulative Perpetual Preferred Stock, Series C, par value $1.00 per share | London Interbank Offered Rate (LIBOR) |  |
Capital Unit [Line Items] |  |
Preferred stock, floating dividend rate | 5.30% |
Fixed-to-Floating Rate Non-Cumulative Perpetual Preferred Stock, Series D, par value $1.00 per share |  |
Capital Unit [Line Items] |  |
Preferred stock, shares issued | 0 | 1,000,000
Preferred stock, carrying value | $ 0 | $ 24,108
Preferred stock, fixed dividend rate | 6.50% |
Preferred stock, dividends paid (usd per share) | $ 1.08 |
Fixed-to-Floating Rate Non-Cumulative Perpetual Preferred Stock, Series D, par value $1.00 per share | London Interbank Offered Rate (LIBOR) |  |
Capital Unit [Line Items] |  |
Preferred stock, floating dividend rate | 5.09% |
Fixed-to-Floating Rate Non-Cumulative Perpetual Preferred Stock, Series E, par value $1.00 per share |  |
Capital Unit [Line Items] |  |
Preferred stock, shares issued | 2,300,000 | 2,300,000
Preferred stock, carrying value | $ 55,593 | $ 55,593
Preferred stock, fixed dividend rate | 6.45% |
Preferred stock, dividends paid (usd per share) | $ 1.47 |
Fixed-to-Floating Rate Non-Cumulative Perpetual Preferred Stock, Series E, par value $1.00 per share | London Interbank Offered Rate (LIBOR) |  |
Capital Unit [Line Items] |  |
Preferred stock, floating dividend rate | 5.14% |
Fixed-to-Floating Rate Non-Cumulative Perpetual Preferred Stock, Series F, par value $1.00 per share |  |
Capital Unit [Line Items] |  |
Preferred stock, shares issued | 3,400,000 | 3,400,000
Preferred stock, carrying value | $ 82,201 | $ 82,201
Preferred stock, fixed dividend rate | 6.00% |
Preferred stock, dividends paid (usd per share) | $ 1.50 |
Fixed-to-Floating Rate Non-Cumulative Perpetual Preferred Stock, Series F, par value $1.00 per share | London Interbank Offered Rate (LIBOR) |  |
Capital Unit [Line Items] |  |
Preferred stock, floating dividend rate | 4.762% |

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- Definition The percentage rate used to calculate dividend payments on preferred stock. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496158-112644 + Details
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- Definition Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt. + References Reference 1: 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 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496158-112644 + Details
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- Definition Aggregate par or stated value of issued nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable preferred shares, par value and other disclosure concepts are in another section within stockholders' equity. + References Reference 1: 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 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=84165509&loc=d3e56426-112766 + Details
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