Contractual Maturities, $250,000 or More, after 12 months

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Contractual Maturities, Time Deposits, $250,000 or More, Six Months Through Twelve Months

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Contractual Maturities, Time Deposits, $250,000 or More, Three Months or Less

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Contractual Maturities, Time Deposits, $250,000 or More, Three Months Through Six Months

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[Line Items] for Deposits Disclosure [Table]

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Increase (Decrease) in Deposit Liabilities, Amount

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Increase (Decrease) in Deposit Liabilities, Percentage

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- Definition

Minimum Eligible Collateral Pledged on Outstanding Deposits Percentage

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- Definition

Time Deposits, $250,000 or More

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No definition available.

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- Definition

Time Deposits, Premium (Discount), Net

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No definition available.

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- Definition

Amount of restricted investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 860
-SubTopic 30
-Name Accounting Standards Codification
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- Definition

Amount of securities, mortgage loans, or other financial instruments pledged as collateral for deposits.

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- Definition

Amount of deposits held by the entity that have been reclassified as loan balances receivable, for example, but not limited to, overdrafts receivable.

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- Definition

The aggregate of all deposit liabilities held by the entity, including foreign and domestic, interest and noninterest bearing; may include demand deposits, saving deposits, Negotiable Order of Withdrawal (NOW) and time deposits among others.

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-Paragraph 1
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- Definition

Amount of interest-bearing domestic third-party deposits placed by or through the assistance of a deposit broker, also known as brokered deposit liabilities.

+ References

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- Definition

Aggregate amount of interest expense on all deposits.

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- Definition

Interest expense incurred on all money market deposits.

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- Definition

Interest expense incurred on all savings account deposits.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1402
-Paragraph b
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- Definition

The aggregate interest expense incurred on time deposits, including certificates of deposits, in domestic offices.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1402
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- Definition

Amount of time deposit maturing after fifth fiscal year following current fiscal year. Time deposit includes, but is not limited to, certificate of deposit. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of time deposit maturing in fifth fiscal year following current fiscal year. Time deposit includes, but is not limited to, certificate of deposit. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of time deposit maturing in fourth fiscal year following current fiscal year. Time deposit includes, but is not limited to, certificate of deposit. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of time deposit maturing in next fiscal year following current fiscal year. Time deposit includes, but is not limited to, certificate of deposit. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of time deposit maturing in third fiscal year following current fiscal year. Time deposit includes, but is not limited to, certificate of deposit. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of time deposit maturing in second fiscal year following current fiscal year. Time deposit includes, but is not limited to, certificate of deposit. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of time deposit liabilities, including certificates of deposit.

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Deposits (Details) - USD ($)	12 Months Ended
Deposits (Details) - USD ($)	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Apr. 02, 2025
Deposits Disclosure [Line Items]
Deposits	$ 15,603,143,000	$ 14,327,489,000
Decrease in deposits	$ (1,280,000,000)
Decrease in percentage of deposit liabilities	(8.90%)
Time Deposits, $250,000 or More	$ 3,211,475,000	2,710,000,000
Brokered deposits	902,000,000.0	1,060,000,000.00
Time deposits	6,375,011,000	5,773,804,000
Time Deposit Maturities, Year One	6,307,690,000
Time Deposit Maturities, Year Two	32,096,000
Time Deposit Maturities, Year Three	9,870,000
Time Deposit Maturities, Year Four	2,995,000
Time Deposit Maturities, Year Five	9,004,000
Time Deposit Maturities, after Year Five	13,356,000
Contractual Maturities, Time Deposits, $250,000 or More, Three Months or Less	1,505,165,000
Contractual Maturities, Time Deposits, $250,000 or More, Three Months Through Six Months	841,355,000
Contractual Maturities, Time Deposits, $250,000 or More, Six Months Through Twelve Months	834,730,000
Contractual Maturities, $250,000 or More, after 12 months	30,225,000
Interest Expense, Money Market Deposits	174,202,000	168,131,000	$ 152,893,000
Interest Expense, Savings Deposits	23,659,000	31,939,000	8,858,000
Interest Expense, Time Deposits	259,389,000	295,378,000	279,480,000
Interest Expense, Deposits	457,250,000	495,448,000	$ 441,231,000
Deposit Liabilities Reclassified as Loans Receivable	2,500,000	1,100,000
Territorial Bancorp Inc.
Deposits Disclosure [Line Items]
Time Deposits, Premium (Discount), Net				$ (147,000)
Territorial
Deposits Disclosure [Line Items]
Deposits				$ 1,670,633,000
2030
Deposits Disclosure [Line Items]
Time deposits	13,400,000
Money market and NOW accounts
Deposits Disclosure [Line Items]
Brokered deposits	455,800,000	527,100,000
Time deposit accounts
Deposits Disclosure [Line Items]
Brokered deposits	446,100,000	536,000,000.0
California State Treasurer
Deposits Disclosure [Line Items]
Time Deposits, $250,000 or More	$ 300,000,000.0	300,000,000.0
Required eligible collateral pledge on outstanding deposits, minimum percentage	110.00%
Securities pledged as collateral		200,500,000
California State Treasurer \| Letter of credit
Deposits Disclosure [Line Items]
Letter of credit issued as collateral	$ 330,000,000.0	$ 150,000,000.0
Hawaii, State and Local Governments
Deposits Disclosure [Line Items]
Time Deposits, $250,000 or More	193,700,000
Securities pledged as collateral	$ 205,500,000