Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Treasury Stock [Member]	Total
Balance at Jun. 30, 2021	$ 1,722	$ 10,156	$ 139,775	$ (1,161)	$ (908)	$ 149,584
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared			(1,527)			(1,527)
Net Income			21,179			21,179
Other comprehensive income (loss), net of taxes				(12,304)		(12,304)
Balance at Mar. 31, 2022	1,722	10,156	159,427	(13,465)	(908)	156,932
Balance at Dec. 31, 2021	1,722	10,156	152,746	(3,733)	(908)	159,983
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared			(507)			(507)
Net Income			7,188			7,188
Other comprehensive income (loss), net of taxes				(9,732)		(9,732)
Balance at Mar. 31, 2022	1,722	10,156	159,427	(13,465)	(908)	156,932
Balance at Jun. 30, 2022	1,722	10,156	165,127	(18,383)	(908)	157,714
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared			(1,645)			(1,645)
Net Income			24,325			24,325
Other comprehensive income (loss), net of taxes				(1,716)		(1,716)
Balance at Mar. 31, 2023	1,722	10,156	187,807	(20,099)	(908)	178,678
Balance at Dec. 31, 2022	1,722	10,156	180,263	(23,026)	(908)	168,207
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared			(547)			(547)
Net Income			8,091			8,091
Other comprehensive income (loss), net of taxes				2,927		2,927
Balance at Mar. 31, 2023	$ 1,722	$ 10,156	$ 187,807	$ (20,099)	$ (908)	$ 178,678