CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock	Preferred Stock	Paid-in Capital	Retained Earnings (Accumulated Deficit)	Accumulated Other Comprehensive Income (Loss)	Total
Balance at Jun. 30, 2015	$ 4	$ 0	$ 118,192	$ (36,968)	$ (51,600)	$ 29,628
Balance (in shares) at Jun. 30, 2015	39,068,068
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)				82,728	(10,185)	72,543
Exercise of stock options			4,017			4,017
Exercise of stock options (in shares)	339,500
Dividends paid			(3,910)	(11,798)		(15,708)
Balance at Jun. 30, 2016	$ 4	0	118,299	33,962	(61,785)	90,480
Balance (in shares) at Jun. 30, 2016	39,407,568
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)				64,615	6,348	70,963
Exercise of stock options			5,541			5,541
Exercise of stock options (in shares)	468,400
Dividends paid				(15,827)		(15,827)
Balance at Jun. 30, 2017	$ 4	0	123,840	82,750	(55,437)	151,157
Balance (in shares) at Jun. 30, 2017	39,875,968
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)				64,883	(21,046)	43,837
Exercise of stock options			5,699			5,699
Exercise of stock options (in shares)	481,740
Dividends paid				(16,073)		(16,073)
Stock-based compensation			334			334
Balance at Jun. 30, 2018	$ 4	$ 0	$ 129,873	$ 131,560	$ (76,483)	$ 184,954
Balance (in shares) at Jun. 30, 2018	40,357,708