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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, 2021	Sep. 30, 2020
Computation of basic and diluted earnings per share
Net income available to common stockholders	$ 19,052	$ 9,344
Weighted average shares outstanding-basic	17,947	18,051
Dilutive effect of equity awards	359	284
Dilutive effect of the Notes	0	0
Weighted average shares outstanding-diluted	18,306	18,335
Basic earnings per share	$ 1.06	$ 0.52
Diluted earnings per share	$ 1.04	$ 0.51
Shares excluded from diluted earnings per share due to their anti-dilutive effect	20	87
1.25% Convertible Senior Notes Due 2022
Per Share Computations
Interest rate (as a percentage)	1.25%
Computation of basic and diluted earnings per share
Conversion price	$ 107.46

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