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Consolidated Statements of Stockholders' Equity (Parenthetical) - $ / shares
3 Months Ended 9 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2018
Statement of Stockholders' Equity [Abstract]      
Stock issued for employee stock purchase plan, shares (in shares) 60,413 39,782  
Stock issued for compensation plans, shares (in shares) 160,305 173,489 105,254
Cash dividends per share (in dollars per share) $ 0.16 $ 0.15 $ 0.45