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Loans and Allowance for Credit Losses (Schedule of Financing Receivables Past Due) (Details) - USD ($) $ in Thousands | Jun. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Financing Receivable Investment Past Due [Line Items] |  |
Loans | $ 23,933,527 | $ 24,297,980
Commercial Real Estate Portfolio Segment [Member] |  |
Financing Receivable Investment Past Due [Line Items] |  |
Loans | 6,473,465 | 6,214,192
Commercial and Industrial Portfolio Segment [Member] |  |
Financing Receivable Investment Past Due [Line Items] |  |
Loans | 8,685,815 | 8,983,226
Pinnacle - municipal finance |  |
Financing Receivable Investment Past Due [Line Items] |  |
Loans | 694,639 | 720,661
Franchise and equipment finance |  |
Financing Receivable Investment Past Due [Line Items] |  |
Loans | 149,022 | 213,477
Mortgage warehouse lending |  |
Financing Receivable Investment Past Due [Line Items] |  |
Loans | 626,589 | 585,610
1-4 single family residential |  |
Financing Receivable Investment Past Due [Line Items] |  |
Loans | 6,310,932 | 6,508,922
US Government Agency Insured Loans [Member] |  |
Financing Receivable Investment Past Due [Line Items] |  |
Loans | 993,065 | 1,071,892
Current |  |
Financing Receivable Investment Past Due [Line Items] |  |
Loans | 23,485,128 | 23,720,130
Current | Commercial Real Estate Portfolio Segment [Member] |  |
Financing Receivable Investment Past Due [Line Items] |  |
Loans | 6,447,178 | 6,145,386
Current | Commercial and Industrial Portfolio Segment [Member] |  |
Financing Receivable Investment Past Due [Line Items] |  |
Loans | 8,635,670 | 8,911,057
Current | Pinnacle - municipal finance |  |
Financing Receivable Investment Past Due [Line Items] |  |
Loans | 694,639 | 720,661
Current | Franchise and equipment finance |  |
Financing Receivable Investment Past Due [Line Items] |  |
Loans | 149,022 | 213,477
Current | Mortgage warehouse lending |  |
Financing Receivable Investment Past Due [Line Items] |  |
Loans | 626,589 | 585,610
Current | 1-4 single family residential |  |
Financing Receivable Investment Past Due [Line Items] |  |
Loans | 6,262,842 | 6,452,828
Current | US Government Agency Insured Loans [Member] |  |
Financing Receivable Investment Past Due [Line Items] |  |
Loans | 669,188 | 691,111
30 - 59 Days Past Due |  |
Financing Receivable Investment Past Due [Line Items] |  |
Loans | 130,664 | 192,399
30 - 59 Days Past Due | Commercial Real Estate Portfolio Segment [Member] |  |
Financing Receivable Investment Past Due [Line Items] |  |
Loans | 0 | 35,000
30 - 59 Days Past Due | Commercial and Industrial Portfolio Segment [Member] |  |
Financing Receivable Investment Past Due [Line Items] |  |
Loans | 4,727 | 16,137
30 - 59 Days Past Due | Pinnacle - municipal finance |  |
Financing Receivable Investment Past Due [Line Items] |  |
Loans | 0 | 0
30 - 59 Days Past Due | Franchise and equipment finance |  |
Financing Receivable Investment Past Due [Line Items] |  |
Loans | 0 | 0
30 - 59 Days Past Due | Mortgage warehouse lending |  |
Financing Receivable Investment Past Due [Line Items] |  |
Loans | 0 | 0
30 - 59 Days Past Due | 1-4 single family residential |  |
Financing Receivable Investment Past Due [Line Items] |  |
Loans | 25,892 | 32,975
30 - 59 Days Past Due | US Government Agency Insured Loans [Member] |  |
Financing Receivable Investment Past Due [Line Items] |  |
Loans | 100,045 | 108,287
60 - 89 Days Past Due |  |
Financing Receivable Investment Past Due [Line Items] |  |
Loans | 36,111 | 78,481
60 - 89 Days Past Due | Commercial Real Estate Portfolio Segment [Member] |  |
Financing Receivable Investment Past Due [Line Items] |  |
Loans | 0 | 0
60 - 89 Days Past Due | Commercial and Industrial Portfolio Segment [Member] |  |
Financing Receivable Investment Past Due [Line Items] |  |
Loans | 1,253 | 25,645
60 - 89 Days Past Due | Pinnacle - municipal finance |  |
Financing Receivable Investment Past Due [Line Items] |  |
Loans | 0 | 0
60 - 89 Days Past Due | Franchise and equipment finance |  |
Financing Receivable Investment Past Due [Line Items] |  |
Loans | 0 | 0
60 - 89 Days Past Due | Mortgage warehouse lending |  |
Financing Receivable Investment Past Due [Line Items] |  |
Loans | 0 | 0
60 - 89 Days Past Due | 1-4 single family residential |  |
Financing Receivable Investment Past Due [Line Items] |  |
Loans | 4,460 | 6,155
60 - 89 Days Past Due | US Government Agency Insured Loans [Member] |  |
Financing Receivable Investment Past Due [Line Items] |  |
Loans | 30,398 | 46,681
90 Days or More Past Due |  |
Financing Receivable Investment Past Due [Line Items] |  |
Loans | 281,624 | 306,970
90 Days or More Past Due | Commercial Real Estate Portfolio Segment [Member] |  |
Financing Receivable Investment Past Due [Line Items] |  |
Loans | 26,287 | 33,806
90 Days or More Past Due | Commercial and Industrial Portfolio Segment [Member] |  |
Financing Receivable Investment Past Due [Line Items] |  |
Loans | 44,165 | 30,387
90 Days or More Past Due | Pinnacle - municipal finance |  |
Financing Receivable Investment Past Due [Line Items] |  |
Loans | 0 | 0
90 Days or More Past Due | Franchise and equipment finance |  |
Financing Receivable Investment Past Due [Line Items] |  |
Loans | 0 | 0
90 Days or More Past Due | Mortgage warehouse lending |  |
Financing Receivable Investment Past Due [Line Items] |  |
Loans | 0 | 0
90 Days or More Past Due | 1-4 single family residential |  |
Financing Receivable Investment Past Due [Line Items] |  |
Loans | 17,738 | 16,964
90 Days or More Past Due | US Government Agency Insured Loans [Member] |  |
Financing Receivable Investment Past Due [Line Items] |  |
Loans | $ 193,434 | $ 225,813

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