Benefit Plans Level 3 (Tables)

3 Months Ended

6 Months Ended

Sep. 30, 2012

Sep. 30, 2012

Notes To Financial Statements [Abstract]

Schedule of Defined Benefit Plans Disclosures [Table Text Block]

Components of the net periodic benefit cost for our defined benefit pension plans and other postretirement medical benefits plan were as follows:

	Defined Benefit Pension Plans												Other Postretirement Benefits Plan
	U.S. Qualified						International
Three Months Ended September 30,	2012			2011			2012			2011			2012			2011
Service cost	$	37		$	51		$	20		$	119		$	—		$	—
Interest cost	523			609			18			69			217			248
Expected return on plan assets	(834		)	(821		)	(24		)	(70		)	—			—
Amortization of loss	333			267			—			—			181			106
Amortization of prior service cost	—			—			—			—			(816		)	(816		)
Net periodic benefit cost (income)	$	59		$	106		$	14		$	118		$	(418	)	$	(462	)

	Defined Benefit Pension Plans												Other Postretirement Benefits Plan
	U.S. Qualified						International
Six Months Ended September 30,	2012			2011			2012			2011			2012			2011
Service cost	$	75		$	103		$	41		$	238		$	—		$	—
Interest cost	1,046			1,219			36			138			434			496
Expected return on plan assets	(1,669		)	(1,642		)	(48		)	(140		)	—			—
Amortization of loss	667			533			—			—			362			212
Curtailment	—			—			(125		)	—			—			—
Amortization of prior service cost	—			—			—			—			(1,631		)	(1,631		)
Net periodic benefit cost (income)	$	119		$	213		$	(96	)	$	236		$	(835	)	$	(923	)