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Basis of Presentation - Per Share Computations (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Feb. 28, 2017
Computation of basic and diluted earnings per share
Net income available to common stockholders	$ 9,344	$ 20,743
Weighted average shares outstanding-basic	18,051	18,259
Dilutive effect of equity awards	284	628
Dilutive effect of the Notes	0	16
Weighted average shares outstanding-diluted	18,335	18,903
Basic earnings per share	$ 0.52	$ 1.14
Diluted earnings per share	$ 0.51	$ 1.10
Shares excluded from diluted earnings per share due to their anti-dilutive effect	87	84
1.25% Convertible Senior Notes Due 2022
Per Share Computations
Interest rate (as a percentage)	1.25%		1.25%

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