Investment Securities - Schedule of Held to maturity Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Jun. 30, 2021
Held to maturity, Amortized Cost
Due in one year or less	$ 1,136	$ 1,209
Due after one through five years	13,141	14,544
Due after five through ten years	82,772	90,798
Due after ten years	108,772	116,755
Total investment securities - held to maturity, Amortized Cost	205,821	223,306
Held to maturity, Estimated Fair Value
Due in one year or less	1,152	1,218
Due after one through five years	13,696	15,179
Due after five through ten years	83,286	91,780
Due after ten years	108,286	116,544
Total investment securities - held to maturity, Estimated Fair Value	$ 206,420	$ 224,721

Fair value of investment in debt security measured at amortized cost (held-to-maturity), 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).

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Fair value of investment in debt security measured at amortized cost (held-to-maturity), with single maturity date and allocated without single maturity date, maturing in second through fifth 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).

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