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DEPOSITS (Tables) | 12 Months Ended
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Dec. 31, 2023
Deposits [Abstract] |
Summary of deposits | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31,
​ | ​ | 2023 | ​ | 2022
​ | ​ | Weighted | ​ | ​ | ​ | ​ | ​ | Weighted | ​ | ​ | ​ | ​
​ | ​ | Average | ​ | ​ | ​ | ​ | ​ | Average | ​ | ​ | ​ | ​
(Dollars in thousands) |  | Rate | ​ | ​ | Liability |  | Rate | ​ | ​ | Liability
Savings (1) |  | 3.67 | % | ​ | $ | 2,335,490 |  | 2.24 | % | ​ | $ | 2,260,101
CDs |  | 4.43 | ​ | ​ |  | 1,607,683 |  | 2.25 | ​ | ​ |  | 1,115,364
Money market |  | 3.46 | ​ | ​ |  | 3,125,996 |  | 1.50 | ​ | ​ |  | 2,532,270
Interest-bearing checking |  | 0.77 | ​ | ​ |  | 515,987 |  | 1.01 | ​ | ​ |  | 827,454
Non-interest-bearing checking (1) |  | — | ​ | ​ |  | 2,945,499 |  | — | ​ | ​ |  | 3,519,218
Total |  | 2.56 | % | ​ | $ | 10,530,655 |  | 1.19 | % | ​ | $ | 10,254,407
(1) | Includes mortgage escrow deposits.
Summary of scheduled maturities of CDs outstanding | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Maturing | ​ | Weighted Average | ​
(Dollars in thousands) |  | Balance |  | Interest Rate | ​
2024 |  | $ | 1,489,735 | ​ | 4.60 | %
2025 | ​ |  | 81,297 | ​ | 2.52 | ​
2026 | ​ |  | 25,742 | ​ | 2.26 | ​
2027 | ​ |  | 7,527 | ​ | 0.18 | ​
2028 | ​ |  | 3,382 | ​ | 0.05 | ​
2029 and beyond | ​ |  | — | ​ | — | ​
Total | ​ | $ | 1,607,683 | ​ | 4.43 | %

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- Definition Scheduled maturities of certificates of deposits presented as less than $100,000 and $100,000 or more. + References No definition available. + Details
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- Definition Tabular disclosure of type of deposit liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name Regulation S-K (SK) -Number 229 -Section 1406 -Paragraph (a) -Publisher SEC Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Name Regulation S-K (SK) -Number 229 -Section 1406 -Paragraph (a) -Subparagraph (1) -Publisher SEC Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Name Regulation S-K (SK) -Number 229 -Section 1406 -Paragraph (a) -Subparagraph (2) -Publisher SEC Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Name Regulation S-K (SK) -Number 229 -Section 1406 -Paragraph (a) -Subparagraph (3) -Publisher SEC Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Name Regulation S-K (SK) -Number 229 -Section 1406 -Paragraph (a) -Subparagraph (4) -Publisher SEC Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef -Name Regulation S-K (SK) -Number 229 -Section 1406 -Paragraph (a) -Subparagraph (5) -Publisher SEC Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef -Name Regulation S-K (SK) -Number 229 -Section 1406 -Paragraph (c) -Publisher SEC Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef -Name Regulation S-K (SK) -Number 229 -Section 1406 -Paragraph (d) -Publisher SEC Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef -Name Regulation S-K (SK) -Number 229 -Section 1406 -Paragraph (e) -Publisher SEC Reference 10: http://www.xbrl.org/2009/role/commonPracticeRef -Name Regulation S-K (SK) -Number 229 -Section 1406 -Paragraph (f) -Subparagraph (1) -Publisher SEC Reference 11: http://www.xbrl.org/2009/role/commonPracticeRef -Name Regulation S-K (SK) -Number 229 -Section 1406 -Paragraph (f) -Subparagraph (2) -Publisher SEC Reference 12: http://www.xbrl.org/2009/role/commonPracticeRef -Name Regulation S-K (SK) -Number 229 -Section 1406 -Paragraph (f) -Subparagraph (2)(i) -Publisher SEC Reference 13: http://www.xbrl.org/2009/role/commonPracticeRef -Name Regulation S-K (SK) -Number 229 -Section 1406 -Paragraph (f) -Subparagraph (2)(i)(ii) -Publisher SEC Reference 14: http://www.xbrl.org/2009/role/commonPracticeRef -Name Regulation S-K (SK) -Number 229 -Section 1406 -Paragraph (f) -Subparagraph (2)(i)(iii) -Publisher SEC Reference 15: http://www.xbrl.org/2009/role/commonPracticeRef -Name Regulation S-K (SK) -Number 229 -Section 1406 -Paragraph (f) -Subparagraph (2)(i)(iv) -Publisher SEC + Details
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