Retirement Benefits (Tables)

9 Months Ended

Mar. 31, 2016

Compensation And Retirement Disclosure [Abstract]

Components of Net Periodic Benefit Costs

The following table presents the components of net periodic benefit cost for the three and nine months ended March 31, 2016 and 2015:

	Three Months Ended March 31,						Nine months ended March 31,
	2016			2015			2016			2015
Service cost	$	1,394		$	908		$	4,233		$	2,935
Interest cost		1,715			1,591			5,156			4,975
Expected return on plan assets		(29	)		(60	)		(91	)		(189	)
Amortization of prior service cost		247			243			741			730
Amortization of net loss		1,313			918			3,937			2,847
Curtailments and settlements		(91	)		(845	)		(273	)		(454	)
Net periodic benefit cost	$	4,549		$	2,755		$	13,703		$	10,844