XML 48 R37.htm IDEA: XBRL DOCUMENT
v3.25.2

Investment Securities (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2025
Investment Securities |
Schedule of amortized cost and fair value of investment securities held to maturity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Gross |  | Gross | ​ | ​ |
​ | ​ | Amortized | ​ | Unrealized | ​ | Unrealized | ​ | Fair |
(Dollars in thousands) |  | Cost |  | Gains |  | Losses |  | Value |
June 30, 2025: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
U.S. Government agencies | ​ | $ | 132,910 | ​ | $ | — | ​ | $ | (19,050) | ​ | $ | 113,860 | ​
Residential mortgage-backed securities issued by U.S. government | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
agencies or sponsored enterprises | ​ | ​ | 1,226,097 | ​ | ​ | — | ​ | ​ | (209,197) | ​ | ​ | 1,016,900 | ​
Residential collateralized mortgage-obligations issued by U.S. government | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
agencies or sponsored enterprises | ​ | ​ | 395,349 | ​ | ​ | — | ​ | ​ | (62,090) | ​ | ​ | 333,259 | ​
Commercial mortgage-backed securities issued by U.S. government | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
agencies or sponsored enterprises | ​ | ​ | 343,953 | ​ | ​ | — | ​ | ​ | (64,067) | ​ | ​ | 279,886 | ​
Small Business Administration loan-backed securities | ​ | ​ | 47,682 | ​ | ​ | — | ​ | ​ | (9,839) | ​ | ​ | 37,843 | ​
​ | ​ | $ | 2,145,991 | ​ | $ | — | ​ | $ | (364,243) | ​ | $ | 1,781,748 | ​
December 31, 2024: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
U.S. Government agencies | ​ | $ | 147,272 | ​ | $ | — | ​ | $ | (23,498) | ​ | $ | 123,774 | ​
Residential mortgage-backed securities issued by U.S. government | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
agencies or sponsored enterprises | ​ | ​ | 1,297,543 | ​ | ​ | — | ​ | ​ | (241,204) | ​ | ​ | 1,056,339 | ​
Residential collateralized mortgage-obligations issued by U.S. government | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
agencies or sponsored enterprises | ​ | ​ | 411,721 | ​ | ​ | — | ​ | ​ | (72,057) | ​ | ​ | 339,664 | ​
Commercial mortgage-backed securities issued by U.S. government | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
agencies or sponsored enterprises | ​ | ​ | 348,338 | ​ | ​ | — | ​ | ​ | (72,391) | ​ | ​ | 275,947 | ​
Small Business Administration loan-backed securities | ​ | ​ | 49,796 | ​ | ​ | — | ​ | ​ | (10,993) | ​ | ​ | 38,803 | ​
​ | ​ | $ | 2,254,670 | ​ | $ | — | ​ | $ | (420,143) | ​ | $ | 1,834,527 | ​
Schedule of amortized cost and fair value of investment securities available for sale | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Gross | ​ | Gross | ​ | ​ | ​ | ​
​ | ​ | Amortized | ​ | Unrealized | ​ | Unrealized | ​ | Fair |
(Dollars in thousands) |  | Cost |  | Gains |  | Losses |  | Value |
June 30, 2025: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Residential mortgage-backed securities issued by U.S. government | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
agencies or sponsored enterprises | ​ | $ | 1,687,317 | ​ | $ | 3,839 | ​ | $ | (167,277) | ​ | $ | 1,523,879 | ​
Residential collateralized mortgage-obligations issued by U.S. government | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
agencies or sponsored enterprises | ​ | ​ | 2,336,853 | ​ | ​ | 15,927 | ​ | ​ | (55,809) | ​ | ​ | 2,296,971 | ​
Commercial mortgage-backed securities issued by U.S. government | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
agencies or sponsored enterprises | ​ | ​ | 661,425 | ​ | ​ | 1,787 | ​ | ​ | (81,720) | ​ | ​ | 581,492 | ​
State and municipal obligations | ​ |  | 1,108,538 | ​ |  | 92 | ​ |  | (186,213) | ​ |  | 922,417 | ​
Small Business Administration loan-backed securities | ​ |  | 604,070 | ​ |  | 636 | ​ |  | (28,192) | ​ |  | 576,514 | ​
Corporate securities | ​ | ​ | 28,499 | ​ | ​ | — | ​ | ​ | (1,905) | ​ | ​ | 26,594 | ​
​ | ​ | $ | 6,426,702 | ​ | $ | 22,281 | ​ | $ | (521,116) | ​ | $ | 5,927,867 | ​
December 31, 2024: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
U.S. Treasuries | ​ | $ | 10,654 | ​ | $ | 2 | ​ | $ | — | ​ | $ | 10,656 | ​
U.S. Government agencies | ​ | ​ | 169,207 | ​ | ​ | — | ​ | ​ | (18,789) | ​ | ​ | 150,418 | ​
Residential mortgage-backed securities issued by U.S. government | ​ |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
agencies or sponsored enterprises | ​ | ​ | 1,659,851 | ​ |  | 97 | ​ |  | (282,423) | ​ |  | 1,377,525 | ​
Residential collateralized mortgage-obligations issued by U.S. government | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
agencies or sponsored enterprises | ​ | ​ | 557,288 | ​ | ​ | 19 | ​ | ​ | (98,212) | ​ | ​ | 459,095 | ​
Commercial mortgage-backed securities issued by U.S. government | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
agencies or sponsored enterprises | ​ | ​ | 1,234,573 | ​ | ​ | 562 | ​ | ​ | (194,580) | ​ | ​ | 1,040,555 | ​
State and municipal obligations | ​ | ​ | 1,117,330 | ​ |  | 2 | ​ |  | (171,609) | ​ |  | 945,723 | ​
Small Business Administration loan-backed securities | ​ |  | 351,814 | ​ |  | 19 | ​ |  | (41,721) | ​ |  | 310,112 | ​
Corporate securities | ​ |  | 28,499 | ​ | ​ | — | ​ | ​ | (1,990) | ​ | ​ | 26,509 | ​
​ | ​ | $ | 5,129,216 | ​ | $ | 701 | ​ | $ | (809,324) | ​ | $ | 4,320,593 | ​
Schedule of amortized cost and carrying value of other investment securities | ​
​ | ​ | ​ | ​ | ​
​ | ​ | Carrying |
(Dollars in thousands) |  | Value |
June 30, 2025: | ​ | ​ | ​ | ​
Federal Home Loan Bank stock | ​ | $ | 18,090 | ​
Federal Reserve Bank stock | ​ | ​ | 234,374 | ​
Investment in unconsolidated subsidiaries | ​ |  | 5,287 | ​
Other investment securities | ​ |  | 99,736 | ​
​ | ​ | $ | 357,487 | ​
December 31, 2024: | ​ | ​ | ​ | ​
Federal Home Loan Bank stock | ​ | $ | 18,087 | ​
Federal Reserve Bank stock | ​ | ​ | 150,261 | ​
Investment in unconsolidated subsidiaries | ​ |  | 3,563 | ​
Other investment securities | ​ |  | 51,702 | ​
​ | ​ | $ | 223,613 | ​
Schedule of amortized cost and fair value of debt and equity securities by contractual maturity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Securities | ​ | Securities |
​ | ​ | Held to Maturity | ​ | Available for Sale |
​ | ​ | Amortized | ​ | Fair | ​ | Amortized | ​ | Fair |
(Dollars in thousands) |  | Cost |  | Value |  | Cost |  | Value |
Due in one year or less |  | $ | — | ​ | $ | — |  | $ | 38,471 |  | $ | 38,295 | ​
Due after one year through five years | ​ |  | 56,126 | ​ |  | 52,172 | ​ |  | 205,691 | ​ |  | 203,072 | ​
Due after five years through ten years | ​ |  | 397,667 | ​ |  | 348,885 | ​ |  | 694,006 | ​ |  | 640,680 | ​
Due after ten years | ​ |  | 1,692,198 | ​ |  | 1,380,691 | ​ |  | 5,488,534 | ​ |  | 5,045,820 | ​
​ | ​ | $ | 2,145,991 | ​ | $ | 1,781,748 | ​ | $ | 6,426,702 | ​ | $ | 5,927,867 | ​
Schedule of information with respect to sales of available-for-sale securities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Six Months Ended June 30, | ​
​ | ​ | 2025 |
(Dollars in thousands) | ​ | Sales of Securities Acquired from Independent | ​ | Investment Securities Sales | ​ | Total | ​
Sale proceeds | ​ | $ | 1,279,717 |  | $ | 1,594,393 | ​ | $ | 2,874,110 | ​
Gross realized gains | ​ | ​ | — | ​ | ​ | 8,892 | ​ | ​ | 8,892 | ​
Gross realized losses | ​ |  | — | ​ |  | (237,703) | ​ |  | (237,703) | ​
Net realized losses | ​ | $ | — | ​ | $ | (228,811) | ​ | $ | (228,811) | ​
Schedule of securities with gross unrealized losses, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Less Than | ​ | Twelve Months |
​ | ​ | Twelve Months | ​ | or More |
​ | ​ | Gross Unrealized | ​ | Fair | ​ | Gross Unrealized | ​ | Fair |
(Dollars in thousands) |  | Losses |  | Value |  | Losses |  | Value |
June 30, 2025: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Securities Held to Maturity | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
U.S. Government agencies | ​ | $ | — | ​ | $ | — | ​ | $ | 19,050 | ​ | $ | 113,860 | ​
Residential mortgage-backed securities issued by U.S. government | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
agencies or sponsored enterprises | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 209,197 | ​ | ​ | 1,016,900 | ​
Residential collateralized mortgage-obligations issued by U.S. government | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
agencies or sponsored enterprises | ​ | ​ | — | ​ |  | — | ​ |  | 62,090 | ​ |  | 333,259 | ​
Commercial mortgage-backed securities issued by U.S. government | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
agencies or sponsored enterprises | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 64,067 | ​ | ​ | 279,886 | ​
Small Business Administration loan-backed securities | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 9,839 | ​ | ​ | 37,843 | ​
​ | ​ | $ | — | ​ | $ | — | ​ | $ | 364,243 | ​ | $ | 1,781,748 | ​
Securities Available for Sale | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Residential mortgage-backed securities issued by U.S. government | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
agencies or sponsored enterprises | ​ | $ | 1,267 | ​ | $ | 96,348 | ​ | $ | 166,010 | ​ | $ | 838,193 | ​
Residential collateralized mortgage-obligations issued by U.S. government | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
agencies or sponsored enterprises | ​ | ​ | 1,627 | ​ |  | 398,768 | ​ |  | 54,181 | ​ |  | 308,971 | ​
Commercial mortgage-backed securities issued by U.S. government | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
agencies or sponsored enterprises | ​ |  | 135 | ​ | ​ | 39,092 | ​ | ​ | 81,585 | ​ | ​ | 414,247 | ​
State and municipal obligations | ​ |  | 315 | ​ | ​ | 6,672 | ​ | ​ | 185,899 | ​ | ​ | 881,624 | ​
Small Business Administration loan-backed securities | ​ |  | 143 | ​ | ​ | 121,492 | ​ | ​ | 28,049 | ​ | ​ | 218,036 | ​
Corporate securities | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 1,905 | ​ | ​ | 26,593 | ​
​ | ​ | $ | 3,487 | ​ | $ | 662,372 | ​ | $ | 517,629 | ​ | $ | 2,687,664 | ​
December 31, 2024: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Securities Held to Maturity | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
U.S. Government agencies | ​ | $ | — | ​ | $ | — | ​ | $ | 23,498 | ​ | $ | 123,774 | ​
Residential mortgage-backed securities issued by U.S. government | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
agencies or sponsored enterprises | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 241,204 | ​ | ​ | 1,056,339 | ​
Residential collateralized mortgage-obligations issued by U.S. government | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
agencies or sponsored enterprises | ​ | ​ | — | ​ |  | — | ​ |  | 72,057 | ​ |  | 339,664 | ​
Commercial mortgage-backed securities issued by U.S. government | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
agencies or sponsored enterprises | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 72,391 | ​ | ​ | 275,947 | ​
Small Business Administration loan-backed securities | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 10,993 | ​ | ​ | 38,803 | ​
​ | ​ | $ | — | ​ | $ | — | ​ | $ | 420,143 | ​ | $ | 1,834,527 | ​
Securities Available for Sale | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
U.S. Treasuries | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​
U.S. Government agencies | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 18,789 | ​ | ​ | 150,418 | ​
Residential mortgage-backed securities issued by U.S. government | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
agencies or sponsored enterprises | ​ | ​ | 294 | ​ | ​ | 14,341 | ​ | ​ | 282,129 | ​ | ​ | 1,350,268 | ​
Residential collateralized mortgage-obligations issued by U.S. government | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
agencies or sponsored enterprises | ​ | ​ | — | ​ |  | — | ​ |  | 98,212 | ​ |  | 454,908 | ​
Commercial mortgage-backed securities issued by U.S. government | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
agencies or sponsored enterprises | ​ | ​ | 792 | ​ | ​ | 53,342 | ​ | ​ | 193,788 | ​ | ​ | 918,338 | ​
State and municipal obligations | ​ | ​ | 1,484 | ​ | ​ | 19,400 | ​ | ​ | 170,125 | ​ | ​ | 923,431 | ​
Small Business Administration loan-backed securities | ​ | ​ | 24 | ​ | ​ | 6,747 | ​ | ​ | 41,697 | ​ | ​ | 289,786 | ​
Corporate securities | ​ |  | — | ​ | ​ | — | ​ | ​ | 1,990 | ​ | ​ | 26,509 | ​
​ | ​ | $ | 2,594 | ​ | $ | 93,830 | ​ | $ | 806,730 | ​ | $ | 4,113,658 | ​
Schedule of trading securities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | June 30, | ​ | December 31, | ​
(Dollars in thousands) |  | 2025 |  | 2024 | ​
U.S. Government agencies | ​ | $ | 12,908 | ​ | $ | 15,002 | ​
Residential mortgage pass-through securities issued or guaranteed by U.S. | ​ | ​ | ​ | ​ | ​ | ​ | ​
government agencies or sponsored enterprises | ​ | ​ | 6,501 | ​ | ​ | 14,803 | ​
Commercial mortgage-backed securities issued by U.S. government | ​ | ​ | ​ | ​ | ​ | ​ | ​
agencies or sponsored enterprises | ​ | ​ | 6,967 | ​ | ​ | 14,419 | ​
State and municipal obligations | ​ | ​ | 20,228 | ​ | ​ | 35,896 | ​
Small Business Administration loan-backed securities | ​ | ​ | 48,702 | ​ | ​ | 22,571 | ​
Other debt securities | ​ | ​ | — | ​ | ​ | 241 | ​
​ | ​ | $ | 95,306 | ​ | $ | 102,932 | ​

X
- References No definition available. + Details
Name: | ssb_InvestmentSecuritiesDisclosureAbstract
Namespace Prefix: | ssb_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the reconciliation of other investment securities from cost basis to fair value. + References No definition available. + Details
Name: | ssb_ScheduleOfOtherInvestmentSecuritiesReconciliationTableTextBlock
Namespace Prefix: | ssb_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure 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 50 -Paragraph 9 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-9 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-3 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-2 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-2 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-2 Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (aa) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-2 Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (aaa) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-2 Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-2 Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-3 Reference 10: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-3 Reference 11: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-3 Reference 12: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-3 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of information about investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-5 Reference 2: 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 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5B -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-5B Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-5 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (aaa) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-5 Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-5 Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-5 Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (f)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-5 Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (f)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-5 Reference 10: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (f)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-5 Reference 11: http://www.xbrl.org/2009/role/commonPracticeRef -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 12: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5A -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-5A Reference 13: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5A -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-5A Reference 14: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5A -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-5A Reference 15: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5B -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-5B Reference 16: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5B -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-5B Reference 17: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5B -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-5B Reference 18: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5B -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-5B + Details
Name: | us-gaap_HeldToMaturitySecuritiesTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments. + References No definition available. + Details
Name: | us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the reconciliation of available-for-sale securities from cost basis to fair value. + References No definition available. + Details
Name: | us-gaap_ScheduleOfAvailableForSaleSecuritiesReconciliationTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of investment in debt security measured at fair value with change in fair value recognized in net income (trading) and investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6B -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6B + Details
Name: | us-gaap_TradingSecuritiesAndCertainTradingAssetsTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of unrealized gains and losses on investments. + References No definition available. + Details
Name: | us-gaap_UnrealizedGainLossOnInvestmentsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration