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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parentheticals) - USD ($)
3 Months Ended 6 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Statement of Comprehensive Income [Abstract]        
Unrealized loss on cash flow hedges, tax effect $ (252,000) $ (515,000) $ (380,000) $ (1,737,000)
Gain (loss) reclassified into net income, tax effect (33,000) 294,000 (38,000) 478,000
Actuarial gain, tax effect 1,077,000 (92,000) 484,000 210,000
Amortization of actuarial loss into net income, tax effect 57,000 34,000 119,000 66,000
Unrealized net gain (loss) on short-term investments, tax effect $ 0 $ 0 $ 0 $ 0