Employee Benefit Plans, Supplemental Executive Retirement Plan (Details) - Supplemental Executive Retirement Plan [Member] $ in Thousands	12 Months Ended
	Jun. 30, 2017 USD ($) Installment	Jun. 30, 2016 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Vesting period	10 years
Period in which lump sum benefit will be paid in the event of death, disability or termination	2 years
Number of annual installments in which benefit will be paid | Installment	10
Net periodic pension costs	$ 509	$ 398
Postemployment benefits liability	$ 2,900	$ 2,000
Deferred Base Salary [Member]
Defined Benefit Plan Disclosure [Line Items]
Maximum annual contribution per employee	50.00%
Deferred Annual Bonus [Member]
Defined Benefit Plan Disclosure [Line Items]
Maximum annual contribution per employee	100.00%