Advances from the Federal Home Loan Bank (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Federal Home Loan Bank, Advances, Rolling Maturity
Due within one year	$ 92,000	$ 82,000
Due over 1 year to 2 years	40,000	45,000
Due over 2 years to 3 years	30,000	20,000
Due over 3 years to 4 years	70,000	30,000
Due over 4 years to 5 years	5,000	60,000
Due over 5 years to 6 years		5,000
Total	$ 237,000	$ 242,000
Weighted Average Rate
Due within one year (as a percent)	1.74%	1.40%
Due over 1 year to 2 years (as a percent)	2.41%	2.87%
Due over 2 years to 3 years (as a percent)	4.28%	3.20%
Due over 3 years to 4 years (as a percent)	4.32%	4.24%
Due over 4 years to 5 years (as a percent)	4.38%	4.32%
Due over 5 years to 6 years (as a percent)		4.38%
Total (as a percent)	2.99%	2.96%
FHLB Des Moines
Federal Home Loan Bank advances
Available additional unused FHLB advances	$ 593,500	$ 612,600
Territorial Savings Bank | FHLB Des Moines
Federal Home Loan Bank advances
Percentage of total assets used to determine maximum line of credit	45.00%	45.00%