RETIREMENT SAVINGS PLANS (Detail Textual) - USD ($)	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Supplemental Savings Plan
Defined Contribution Plan Disclosure [Line Items]
Employee contribution, maximum percentage of compensation	50.00%
Contribution expense	$ 1,600,000	$ 1,200,000	$ 700,000
Employee contribution maximum, percentage of bonuses	100.00%
Employer contribution percentage	5.00%
Employer contribution vesting period	5 years
Annual IRC compensation limit	$ 280,000
Supplemental savings plan obligation	98,900,000
Supplemental savings plan obligation, current portion	6,700,000
Change in supplemental savings plan obligation	5,000,000
Supplemental Savings Plan investment gains	4,800,000
Supplemental Savings Plan participant compensation deferral	10,300,000
Company contributions	1,600,000
Distributions paid to participants	11,700,000
Supplemental Savings Plan COLI gains	4,600,000	3,500,000
COLI portion of supplemental savings plan assets	$ 92,700,000	91,500,000
401 (k) Plan
Defined Contribution Plan Disclosure [Line Items]
Employee contribution, maximum percentage of compensation	75.00%
Employer matching contribution, percent of match	8.00%
Employer matching contribution, percent of employee salary deferral	50.00%
Contribution expense	$ 35,000,000	27,100,000	24,000,000
Employer contribution vesting period	3 years
401(k) profit-sharing plans (PSP)
Defined Contribution Plan Disclosure [Line Items]
Discretionary contribution expense	$ 32,000,000	$ 26,300,000	$ 22,800,000