Fair Value Measurements - Fair Value Measurements at Reporting Date and Gain (Losses) from Fair Value Changes. (Details) - Non-Recurring - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually evaluated loans	$ 7,471	$ 40,681
Gain (losses) from fair value changes on impaired loans	249	826
Other real estate owned	14,314	131
Gain (losses) from fair value changes on other real estate owned	43	23
(Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually evaluated loans	0	0
Other real estate owned	0	0
(Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually evaluated loans	0	0
Other real estate owned	0	0
(Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually evaluated loans	7,471	40,681
Other real estate owned	$ 14,314	$ 131