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Securities - Scheduled Contractual Maturities of HTM Debt Securities (Details) $ in Thousands | Sep. 30, 2025 USD ($)
--- | ---
Amortized cost |
Within One Year | $ 0
After One Year through Five Years | 686,181
After Five Years through Ten Years | 635,844
After Ten Years | 1,558,657
Total | 2,880,682
Fair value |
Within One Year | 0
After One Year through Five Years | 654,592
After Five Years through Ten Years | 549,160
After Ten Years | 1,263,610
Total | $ 2,467,362
Weighted Average Yield |
Within One Year | 0.00%
After One Year through Five Years | 1.13%
After Five Years through Ten Years | 1.89%
After Ten Years | 1.80%
Total | 1.66%
U.S. Treasury securities |
Amortized cost |
Within One Year | $ 0
After One Year through Five Years | 539,255
After Five Years through Ten Years | 0
After Ten Years | 0
Total | 539,255
Fair value |
Within One Year | 0
After One Year through Five Years | 519,800
After Five Years through Ten Years | 0
After Ten Years | 0
Total | $ 519,800
Weighted Average Yield |
Within One Year | 0.00%
After One Year through Five Years | 1.05%
After Five Years through Ten Years | 0.00%
After Ten Years | 0.00%
Total | 1.05%
U.S. government agency and U.S. government-sponsored enterprise debt securities |
Amortized cost |
Within One Year | $ 0
After One Year through Five Years | 105,322
After Five Years through Ten Years | 467,017
After Ten Years | 434,263
Total | 1,006,602
Fair value |
Within One Year | 0
After One Year through Five Years | 96,630
After Five Years through Ten Years | 403,405
After Ten Years | 354,062
Total | $ 854,097
Weighted Average Yield |
Within One Year | 0.00%
After One Year through Five Years | 1.37%
After Five Years through Ten Years | 1.93%
After Ten Years | 1.98%
Total | 1.90%
U.S. government agency and U.S. government-sponsored enterprise mortgage-backed securities |
Amortized cost |
Within One Year | $ 0
After One Year through Five Years | 41,604
After Five Years through Ten Years | 168,827
After Ten Years | 938,382
Total | 1,148,813
Fair value |
Within One Year | 0
After One Year through Five Years | 38,162
After Five Years through Ten Years | 145,755
After Ten Years | 764,180
Total | $ 948,097
Weighted Average Yield |
Within One Year | 0.00%
After One Year through Five Years | 1.54%
After Five Years through Ten Years | 1.77%
After Ten Years | 1.68%
Total | 1.68%
Municipal securities |
Amortized cost |
Within One Year | $ 0
After One Year through Five Years | 0
After Five Years through Ten Years | 0
After Ten Years | 186,012
Total | 186,012
Fair value |
Within One Year | 0
After One Year through Five Years | 0
After Five Years through Ten Years | 0
After Ten Years | 145,368
Total | $ 145,368
Weighted Average Yield |
Within One Year | 0.00%
After One Year through Five Years | 0.00%
After Five Years through Ten Years | 0.00%
After Ten Years | 2.02%
Total | 2.02%

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- Definition Amount excluding accrued interest, after allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity) with single maturity date and allocated without single maturity date. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-5 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 942 -SubTopic 320 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477268/942-320-50-3 + Details
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- Definition Amount excluding accrued interest, after allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity) with single maturity date and allocated without single maturity date, maturing after tenth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (f)(4) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-5 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 320 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477268/942-320-50-3 + Details
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