Consolidated Balance Sheets (Parenthetical) - $ / shares	Jun. 30, 2017	Jun. 30, 2016
Statement of Financial Position [Abstract]
Preferred stock, par value (in dollars per share)	$ 0	$ 0
Preferred stock, shares authorized (in shares)	2,500,000	2,500,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0	$ 0
Common stock, shares authorized (in shares)	75,000,000	75,000,000
Common stock, shares issued (in shares)	22,542,544	21,811,153
Common stock, shares outstanding (in shares)	20,556,403	20,627,511
Treasury stock, shares at cost (in shares)	1,986,141	1,183,642