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Consolidated Statements of Cash Flows - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2024 | Mar. 31, 2024 | Dec. 31, 2023 | Sep. 30, 2023 | Mar. 31, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Dec. 31, 2023
Net Cash Provided by (Used in) Operating Activities [Abstract] |  |  |  |  |  |  |  |
Net Income (Loss) | $ 88,018 | $ 81,169 |  | $ 83,248 | $ 103,360 | $ 284,760 | $ 273,762 |
Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] |  |  |  |  |  |  |  |
Provision for Loan, Lease, and Other Losses | 20,991 |  |  | 21,943 |  | 68,000 | 62,014 |
Depreciation |  |  |  |  |  | 36,414 | 34,703 |
Mortgage Servicing Rights (MSR) Impairment (Recovery) |  |  |  |  |  | 959 | (14,658) |
Amortization of Intangible Assets | 2,203 |  |  | 2,203 |  | 6,608 | 6,608 |
Accretion (Amortization) of Discounts and Premiums, Investments |  |  |  |  |  | 30,998 | 27,394 |
Other Depreciation and Amortization |  |  |  |  |  | 26,307 | 25,830 |
Marketable Securities, Gain (Loss) |  |  |  |  |  | (3,857) | 0 |
Gain (Loss) on Disposition of Assets | 474 |  |  | (625) |  | 1,407 | (590) |
Gain (Loss) on Sale of Mortgage Loans |  |  |  |  |  | 2,284 | 2,154 |
Payment for Origination and Purchase, Loan, Held-for-Sale |  |  |  |  |  | (450,532) | (283,469) |
Proceeds from Sale, Loan, Mortgage, Held-for-Sale |  |  |  |  |  | 415,840 | 254,619 |
Increase (Decrease) in Other Operating Assets and Liabilities, Net [Abstract] |  |  |  |  |  |  |  |
Increase (Decrease) in Accrued Interest Receivable, Net |  |  |  |  |  | 1,792 | (26,670) |
Increase (Decrease) in Interest Payable, Net |  |  |  |  |  | 19,507 | 69,461 |
Increase (Decrease) in Other Accounts Payable and Accrued Liabilities |  |  |  |  |  | 332 | (22,632) |
Increase (Decrease) in Derivative Assets and Liabilities |  |  |  |  |  | (61,615) | 3,721 |
Increase (Decrease) in Other Operating Assets and Liabilities, Net |  |  |  |  |  | (6,084) | (34,137) |
Net Cash Provided by (Used in) Operating Activities, Total |  |  |  |  |  | 373,120 | 378,110 |
Net Cash Provided by (Used in) Investing Activities [Abstract] |  |  |  |  |  |  |  |
Payments for (Proceeds from) Loans and Leases |  |  |  |  |  | (795,057) | (1,436,901) |
Payments for Investing Activities [Abstract] |  |  |  |  |  |  |  |
Payments to Acquire Debt Securities, Available-for-Sale |  |  |  |  |  | (1,177,627) | (1,109,501) |
Payments to Acquire Held-to-Maturity Securities |  |  |  |  |  | 0 | (41,524) |
Payments to Acquire Federal Home Loan Bank Stock |  |  |  |  |  | (122,205) | (114,985) |
Proceeds from Investing Activities [Abstract] |  |  |  |  |  |  |  |
Proceeds from Sale of Debt Securities, Available-for-Sale |  |  |  |  |  | 9,472 | 0 |
Proceeds from Sale of Federal Home Loan Bank Stock |  |  |  |  |  | 196,049 | 131,272 |
Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-Sale |  |  |  |  |  | 660,732 | 288,313 |
Proceeds from Maturities, Prepayments and Calls of Held-to-Maturity Securities |  |  |  |  |  | 92,402 | 101,847 |
Proceeds from Sale and Maturity of Other Investments |  |  |  |  |  | 12,759 | 20,224 |
Payments for (Proceeds from) Productive Assets |  |  |  |  |  | (31,702) | (43,541) |
Net Change in Tax Credit Investments |  |  |  |  |  | (17,856) | (19,615) |
Net Cash Provided by (Used in) Investing Activities, Total |  |  |  |  |  | (1,173,035) | (2,224,411) |
Net Cash Provided by (Used in) Financing Activities [Abstract] |  |  |  |  |  |  |  |
Increase (Decrease) in Deposits |  |  |  |  |  | 108,249 | 2,487,225 |
Proceeds from (Repayments of) Short-Term Debt |  |  |  |  |  | 590,248 | (154,292) |
Increase (Decrease) in Loans from Federal Home Loan Banks |  |  |  |  |  | (35,000) | (580,000) |
Payments of FHLBank Borrowings, Financing Activities |  |  |  |  |  | (727) | (568) |
Proceeds from FHLBank Borrowings, Financing Activities |  |  |  |  |  | 2,656 | 1,369 |
Proceeds from Issuance of Long-Term Debt |  |  |  |  |  | 298,800 | 292,740 |
Payments of Debt Issuance Costs |  |  |  |  |  | (751) | 0 |
Finance Lease, Principal Payments |  |  |  |  |  | (66) | (64) |
Proceeds, Issuance of Shares, Share-Based Payment Arrangement, Including Option Exercised |  |  |  |  |  | 13,281 | 2,362 |
Payments of Ordinary Dividends, Common Stock |  |  |  |  |  | (100,633) | (96,005) |
Payments of Ordinary Dividends, Preferred Stock and Preference Stock |  |  |  |  |  | (8,625) | (8,625) |
Net Cash Provided by (Used in) Financing Activities, Total |  |  |  |  |  | 843,134 | 1,937,635 |
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total |  |  |  |  |  | 43,219 | 91,334 |
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Beginning Balance |  | 923,823 | $ 712,789 |  | 621,455 | 923,823 | 621,455 | $ 621,455
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Ending Balance | 967,042 |  | $ 923,823 | 712,789 |  | 967,042 | 712,789 | 923,823
Supplemental Cash Flow Information [Abstract] |  |  |  |  |  |  |  |
Interest Paid, Excluding Capitalized Interest, Operating Activities |  |  |  |  |  | 796,621 | 576,221 |
Income Taxes Paid, Net |  |  |  |  |  | 6,963 | 68,382 |
Real Estate Owned, Transfer to Real Estate Owned |  |  |  |  |  | 12,586 | 5,917 |
Servicing Asset at Fair Value, Additions |  |  |  |  |  | 4,458 | 2,477 | $ 3,564
Loan and Lease, Transfer from Held-in-Portfolio to Held-for-Sale |  |  |  |  |  | (74,737) | 6,833 |
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax | 37,718 |  |  | (6,762) |  | 18,871 | (19,391) |
Board Authorized Purchase Program [Member] |  |  |  |  |  |  |  |
Net Cash Provided by (Used in) Financing Activities [Abstract] |  |  |  |  |  |  |  |
Payments for Repurchase of Common Stock |  |  |  |  |  | (18,289) | 0 |
Other Assets [Member] |  |  |  |  |  |  |  |
Supplemental Cash Flow Information [Abstract] |  |  |  |  |  |  |  |
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge |  |  |  |  |  | 1,899 | 3,308 |
Other Liabilities [Member] |  |  |  |  |  |  |  |
Supplemental Cash Flow Information [Abstract] |  |  |  |  |  |  |  |
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge |  |  |  |  |  | (10,369) | 18,652 |
Performance/Service Based RSAs, RSA, |  |  |  |  |  |  |  |
Net Cash Provided by (Used in) Financing Activities [Abstract] |  |  |  |  |  |  |  |
Payments for Repurchase of Common Stock |  |  |  |  |  | (6,007) | (6,507) |
Retained Earnings [Member] |  |  |  |  |  |  |  |
Net Cash Provided by (Used in) Operating Activities [Abstract] |  |  |  |  |  |  |  |
Net Income (Loss) | $ 88,018 | $ 81,169 |  | $ 83,248 | $ 103,360 | $ 284,760 | $ 273,762 |

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 40 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482640/350-30-55-40 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482665/350-30-50-2 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482686/350-30-45-2 + Details
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- Definition Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482913/230-10-50-8 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 24 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-24 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-4 + Details
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- Definition Amount of increase (decrease) in cash, cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; including effect from exchange rate change. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 24 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-24 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 1 -SubTopic 230 -Topic 830 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477401/830-230-45-1 + Details
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- Definition Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 + Details
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- Definition The gains (losses) included in earnings that represent the difference between the sale price and the carrying value of loans made to finance real estate acquisitions. This element refers to the gain (loss) and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 45 -Paragraph 1 -SubTopic 310 -Topic 944 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477409/944-310-45-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 45 -Paragraph 2 -SubTopic 310 -Topic 944 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477409/944-310-45-2 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -SubTopic 310 -Topic 944 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477363/944-310-50-1 + Details
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- Definition Amount of cash paid for interest, excluding capitalized interest, classified as operating activity. Includes, but is not limited to, payment to settle zero-coupon bond for accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 17 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-17 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 25 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-25 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482913/230-10-50-2 + Details
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- Definition Amount of cash inflow from issuance of shares under share-based payment arrangement. Includes, but is not limited to, option exercised. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 14 -Subparagraph (a) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-14 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2A -Subparagraph (a) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2A + Details
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- Definition Amount of cash inflow from maturity, prepayment and call 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/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 11 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481830/320-10-45-11 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 11 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-11 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 12 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-12 + Details
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- Definition The cash inflow associated with the maturity, prepayments and calls (requests for early payments) of debt securities designated as held-to-maturity. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 11 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481830/320-10-45-11 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-12 + Details
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- Definition Amount of cash inflow from sale 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 320 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 11 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481830/320-10-45-11 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-9 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-12 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 11 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-11 + Details
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- Definition Amount of cash inflow from sale of Federal Home Loan Bank (FHLB) stock. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 12 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-12 + Details
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