Cash and cash equivalents (Details) - USD ($) $ in Thousands |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Non-interest bearing | ||
| Cash and demand deposits with banks | $ 105,440 | $ 93,145 |
| Interest bearing | ||
| Demand deposits with banks | 171,201 | 165,741 |
| Cash equivalents | 1,432,295 | 1,739,226 |
| Sub-total - Interest bearing | 1,603,496 | 1,904,967 |
| Cash and cash equivalents | $ 1,708,936 | $ 1,998,112 |
| X | ||||||||||
- Definition Cash and Due from Banks, Interest-bearing [Abstract] No definition available.
|
| X | ||||||||||
- Definition Interest-Bearing Deposits In Banks And Other Financial Institutions And Cash Equivalents, Carrying Value No definition available.
|
| X | ||||||||||
- Definition Amount of cash and cash equivalent. Cash includes, but is not limited to, currency on hand, demand deposit with financial institution, and account with general characteristic of demand deposit. Cash equivalent includes, but is not limited to, short-term, highly liquid investment that is both readily convertible to known amount of cash and so near maturity that it presents insignificant risk of change in value because of change in interest rate. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition For banks and other depository institutions: Includes cash on hand (currency and coin), cash items in process of collection, noninterest bearing deposits due from other financial institutions (including corporate credit unions), and noninterest bearing balances with the Federal Reserve Banks, Federal Home Loan Banks and central banks. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount of short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition For banks and other depository institutions (including Federal Reserve Banks, if applicable): Interest-bearing deposits in other financial institutions for relatively short periods of time including, for example, certificates of deposits, which are presented separately from cash on the balance sheet. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|