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Shareholders' Equity and Other Comprehensive Income (Loss) (Tables)
 9 Months Ended
Sep. 30, 2025
Equity [Abstract]  
Schedule of Changes in Accumulated Other Comprehensive Income (Loss) by Component (Net of Income Taxes)
The following table illustrates activity within the balances in accumulated other comprehensive income (loss) by component for the three and nine months ended September 30, 2025 and 2024.
Changes in Accumulated Other Comprehensive Income (Loss) by Component (Net of Income Taxes)
(in thousands)Net unamortized holding (losses) gains on AFS investment securities transferred to HTM
Net unrealized gains (losses) on investment securities AFS(1)
Net unrealized gains (losses) on cash flow hedges(1)
Total
Balance at June 30, 2025$(466,163)$(270,842)$(2,216)$(739,221)
Other comprehensive income (loss) before reclassifications— 43,892 (6,032)37,860 
Amounts reclassified from AOCI15,271 (1,321)10,614 24,564 
Net current period other comprehensive income (loss)15,271 42,571 4,582 62,424 
Balance at September 30, 2025$(450,892)$(228,271)$2,366 $(676,797)
Balance at June 30, 2024$(521,780)$(410,553)$(118,041)$(1,050,374)
Other comprehensive income (loss) before reclassifications— 193,466 40,189 233,655 
Amounts reclassified from AOCI15,044 — 27,889 42,933 
Net current period other comprehensive income (loss)15,044 193,466 68,078 276,588 
Balance at September 30, 2024$(506,736)$(217,087)$(49,963)$(773,786)
Balance at December 31, 2024$(492,828)$(411,413)$(66,524)$(970,765)
Other comprehensive income (loss) before reclassifications— 184,463 31,634 216,097 
Amounts reclassified from AOCI41,936 (1,321)37,256 77,871 
Net current period other comprehensive income (loss)41,936 183,142 68,890 293,968 
Balance at September 30, 2025$(450,892)$(228,271)$2,366 $(676,797)
Balance at December 31, 2023$— $(998,259)$(118,814)$(1,117,073)
Other comprehensive income (loss) before reclassifications(537,434)586,495 (16,949)32,112 
Amounts reclassified from AOCI30,698 194,677 85,800 311,175 
Net current period other comprehensive income (loss)(506,736)781,172 68,851 343,287 
Balance at September 30, 2024$(506,736)$(217,087)$(49,963)$(773,786)
(1)    For September 30, 2025 and 2024, the ending balance in net unrealized gains (losses) on investment securities available for sale and cash flow hedges includes unrealized losses of $10.2 million and $11.6 million, respectively, related to residual tax effects remaining in OCI primarily due to previously established deferred tax asset valuation allowances in 2010 and 2011 and state rate changes. In accordance with ASC 740-20-45-11(b), under the portfolio approach, these unrealized losses are realized at the time the entire portfolio is sold or disposed.