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Acquisition (Tables) | 3 Months Ended
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Mar. 31, 2026
Business Combination, Asset Acquisition, Transaction between Entities under Common Control, and Joint Venture Formation [Abstract] |
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed | The following table summarizes the net assets acquired (at fair value) and consideration transferred for HTLF as of January 31, 2025 (in thousands, except for per share data):
| Fair Value January 31, 2025 |
Assets |  |
Loans, net of allowance for credit losses on loans | $ | 9,734,711 |
Investment securities |  | 3,648,445 |
Interest-bearing due from banks |  | 965,003 |
Cash and due from banks |  | 174,985 |
Premises and equipment, net |  | 174,579 |
Identifiable intangible assets |  | 511,021 |
Other assets |  | 906,712 |
Total assets acquired | $ | 16,115,456 |
Liabilities |  |
Noninterest-bearing deposits | $ | 3,761,997 |
Interest-bearing deposits |  | 10,586,989 |
Long-term debt |  | 278,018 |
Other liabilities |  | 199,532 |
Total liabilities assumed | $ | 14,826,536 |
Net identifiable assets acquired | $ | 1,288,920 |
Preliminary goodwill |  | 1,630,209 |
Net assets acquired | $ | 2,919,129 |
Consideration |  |
Common stock consideration: |  |
Company's common shares issued |  | 23,609 |
Purchase price per share of the Company's common stock | $ | 117.90 |
Fair value of common stock consideration | $ | 2,783,510 |
Preferred stock consideration |  | 115,230 |
Stock-based compensation consideration |  | 20,389 |
Fair value of total consideration transferred | $ | 2,919,129 |
Schedule of Unpaid Principal Balance and Fair Value of Loans Acquired in the HTLF Acquisitions | The following table presents the unpaid principal balance and fair value of the loans acquired in the HTLF acquisition as of the Acquisition Date (in thousands):
| Unpaid Principal Balance |  | Fair Value |
Non-PCD loans | $ | 7,067,238 |  | $ | 6,688,190 |
PCD loans |  | 3,237,332 |  |  | 3,046,521 |
Total loans | $ | 10,304,570 |  | $ | 9,734,711 |
Summary of PCD Loans Purchased | The following table provides a summary of PCD loans purchased as part of the HTLF acquisition as of the Acquisition Date (in thousands):
| January 31, 2025 |
Principal of PCD loans acquired | $ | 3,237,332 |
PCD ACL at acquisition |  | (85,299 | )
Non-credit discount on PCD loans |  | (105,512 | )
Fair value of PCD Loans | $ | 3,046,521 |

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- Definition The entire disclosure for credit loss on financial instrument measured at amortized cost basis, net investment in lease, off-balance sheet credit exposure, and available-for-sale debt security. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-42 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 44 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-44 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-5 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 21 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-21 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479106/326-30-50-4 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-11 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479106/326-30-50-7 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-8 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 20 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-20 + Details
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