Defined Benefit Retirement Plan (Details) - USD ($)	3 Months Ended		9 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Plan, Employer Discretionary Contribution Amount			$ 500,000
Service cost	$ 251,000	$ 247,000	753,000	$ 743,000
Interest cost	289,000	264,000	867,000	793,000
Expected return on plan assets	(409,000)	(428,000)	(1,227,000)	(1,284,000)
Amortization of unrecognized net loss	94,000	61,000	282,000	184,000
Amortization of prior service cost	(22,000)	(22,000)	(66,000)	(65,000)
Net periodic benefit cost	$ 203,000	$ 122,000	$ 609,000	$ 371,000