Retirement Benefits (Tables)

6 Months Ended

Dec. 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 six months ended December 31, 2016 and 2015:

	Three Months Ended December 31,						Six Months Ended December 31,
	2016			2015			2016			2015
Service cost	$	1,599		$	1,405		$	3,253		$	2,839
Interest cost		1,207			1,714			2,433			3,441
Expected return on plan assets		(27	)		(31	)		(55	)		(62	)
Amortization of prior service cost		214			247			428			494
Amortization of net loss		1,029			1,309			2,081			2,624
Curtailments and settlements		-			(90	)		-			(182	)
Net periodic benefit cost	$	4,022		$	4,554		$	8,140		$	9,154