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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parentheticals) - USD ($)
3 Months Ended 9 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Mar. 31, 2017
Mar. 31, 2016
Statement of Comprehensive Income [Abstract]        
Unrealized gain (loss) on cash flow hedges, tax effect $ 125,000 $ 763,000 $ (254,000) $ (974,000)
Gain (loss) reclassified into net income, tax effect 14,000 391,000 (24,000) 869,000
Actuarial gain (loss), tax effect (64,000) (842,000) 420,000 (632,000)
Amortization of actuarial loss into net income, tax effect 59,000 33,000 178,000 99,000
Unrealized net gain (loss) on short-term investments, tax effect $ 0 $ 0 $ 0 $ 0