Retirement Benefits (Tables)

9 Months Ended

Mar. 31, 2013

Compensation And Retirement Disclosure [Abstract]

Components of Net Periodic Benefit Cost

The following table presents the components of net periodic benefit cost for the three and nine months ended March 31, 2013 and 2012:

	Three Months Ended March 31,						Nine Months Ended March 31,
	2013			2012			2013			2012
Service cost	$	550		$	391		$	1,624		$	1,204
Interest cost		1,786			1,956			5,312			5,963
Expected return on plan assets		(70	)		(60	)		(215	)		(179	)
Amortization of prior service cost		287			352			871			1,055
Amortization of net loss		968			448			2,904			1,345
Net periodic benefit cost	$	3,521		$	3,087		$	10,496		$	9,388