CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock	Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Total
Balance at Jun. 30, 2019	$ 4	$ 133,266	$ 168,926	$ (86,181)	$ 216,015
Balance (in shares) at Jun. 30, 2019	40,453,608
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)			2,515	(7,547)	(5,032)
Dividends declared			(4,854)		(4,854)
Stock-based compensation expense		565			565
Balance at Sep. 30, 2019	$ 4	133,831	166,587	(93,728)	206,694
Balance (in shares) at Sep. 30, 2019	40,453,608
Balance at Jun. 30, 2019	$ 4	133,266	168,926	(86,181)	216,015
Balance (in shares) at Jun. 30, 2019	40,453,608
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)					(7,801)
Balance at Mar. 31, 2020	$ 4	134,960	182,273	(121,892)	195,345
Balance (in shares) at Mar. 31, 2020	40,453,608
Balance at Sep. 30, 2019	$ 4	133,831	166,587	(93,728)	206,694
Balance (in shares) at Sep. 30, 2019	40,453,608
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)			11,894	3,118	15,012
Dividends declared			(4,855)		(4,855)
Stock-based compensation expense		564			564
Balance at Dec. 31, 2019	$ 4	134,395	173,626	(90,610)	217,415
Balance (in shares) at Dec. 31, 2019	40,453,608
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)			13,501	(31,282)	(17,781)
Dividends declared			(4,854)		(4,854)
Stock-based compensation expense		565			565
Balance at Mar. 31, 2020	$ 4	134,960	182,273	(121,892)	195,345
Balance (in shares) at Mar. 31, 2020	40,453,608
Balance at Jun. 30, 2020	$ 4	135,525	183,060	(130,385)	188,204
Balance (in shares) at Jun. 30, 2020	40,453,608
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)			12,302	(3,805)	8,497
Dividends declared			(4,854)		(4,854)
Stock-based compensation expense		565			565
Balance at Sep. 30, 2020	$ 4	136,090	190,508	(134,190)	192,412
Balance (in shares) at Sep. 30, 2020	40,453,608
Balance at Jun. 30, 2020	$ 4	135,525	183,060	(130,385)	188,204
Balance (in shares) at Jun. 30, 2020	40,453,608
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)					41,157
Balance at Mar. 31, 2021	$ 4	136,654	205,755	(126,492)	215,921
Balance (in shares) at Mar. 31, 2021	40,503,608
Balance at Sep. 30, 2020	$ 4	136,090	190,508	(134,190)	192,412
Balance (in shares) at Sep. 30, 2020	40,453,608
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)			12,801	12,400	25,201
Dividends declared			(4,855)		(4,855)
Stock-based compensation expense		564			564
Balance at Dec. 31, 2020	$ 4	136,654	198,454	(121,790)	213,322
Balance (in shares) at Dec. 31, 2020	40,453,608
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)			12,161	(4,702)	7,459
Shares issued pursuant to stock incentive plan (in shares)	50,000
Dividends declared			(4,860)		(4,860)
Balance at Mar. 31, 2021	$ 4	$ 136,654	$ 205,755	$ (126,492)	$ 215,921
Balance (in shares) at Mar. 31, 2021	40,503,608