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, 2020	$ 861	$ 11,017	$ 118,263	$ (428)	$ (908)	$ 128,805
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared			(1,962)			(1,962)
Net Income			16,328			16,328
Other comprehensive loss, net of taxes				(4,084)		(4,084)
Balance at Mar. 31, 2021	861	11,017	132,629	(4,512)	(908)	139,087
Balance at Dec. 31, 2020	861	11,017	128,392	(626)	(908)	138,736
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared			(1,021)			(1,021)
Net Income			5,258			5,258
Other comprehensive loss, net of taxes				(3,886)		(3,886)
Balance at Mar. 31, 2021	861	11,017	132,629	(4,512)	(908)	139,087
Balance at Jun. 30, 2021	861	11,017	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 loss, net of taxes				(12,304)		(12,304)
Balance at Mar. 31, 2022	861	11,017	159,427	(13,465)	(908)	156,932
Balance at Dec. 31, 2021	861	11,017	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 loss, net of taxes				(9,732)		(9,732)
Balance at Mar. 31, 2022	$ 861	$ 11,017	$ 159,427	$ (13,465)	$ (908)	$ 156,932