Investment Securities - Securities by contractual maturity (Details) $ in Thousands	Mar. 31, 2024 USD ($)
Available for sale, Amortized Cost
Due in one year or less	$ 3
Due after five years through ten years	41,866
Due after ten years	143,418
Amortized Cost	185,287
Available for sale, Fair Value
Due in one year or less	3
Due after five years through ten years	36,181
Due after ten years	120,459
Fair Value	156,643
Held to maturity, Amortized Cost
Due in one year or less	5,515
Due after ten years	89,356
Amortized Cost	94,871
Held to maturity, Fair Value
Due in one year or less	5,482
Due after ten years	73,161
Fair Value	$ 78,643

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in sixth through tenth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-3