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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($)	3 Months Ended		6 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Unrealized gain (loss) on cash flow hedges, tax (recovery) expense	$ (677,000)	$ (60,000)	$ (496,000)	$ 403,000
(Gain) loss reclassified into net income, tax (expense) recovery	169,000	(141,000)	301,000	(428,000)
Actuarial gain (loss), tax (recovery) expense	(519,000)	(153,000)	(213,000)	(236,000)
Amortization of actuarial (gain) loss into net income, tax recovery (expense)	72,000	43,000	145,000	85,000
Release of unrealized gain on marketable securities, tax effect	$ 0	$ 0	$ 0	$ 0

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- Definition

Amount of tax expense (benefit) for (increase) decrease in value of benefit obligation for change in actuarial assumptions and increase (decrease) in value of plan assets from experience different from that assumed of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit.

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Amount of tax expense (benefit) of reclassification adjustment from accumulated other comprehensive income of accumulated gain (loss) realized from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's deferred hedging gain (loss).

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