Benefit Plans Level 3 (Tables)

3 Months Ended

9 Months Ended

Dec. 31, 2013

Dec. 31, 2013

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
Three Months Ended December 31,	2013			2012			2013			2012
Service cost	$	40		$	37		$	—		$	—
Interest cost	450			523			171			217
Expected return on plan assets	(861		)	(834		)	—			—
Amortization of loss	365			333			223			181
Amortization of prior service cost	—			—			(816		)	(816		)
Net periodic benefit cost (income)	$	(6	)	$	59		$	(422	)	$	(418	)

	Defined Benefit Pension Plans						Other Postretirement Benefits Plan
Nine Months Ended December 31,	2013			2012			2013			2012
Service cost	$	120		$	112		$	—		$	—
Interest cost	1,349			1,569			512			650
Expected return on plan assets	(2,582		)	(2,503		)	—			—
Amortization of loss	1,094			1,000			668			544
Amortization of prior service cost	—			—			(2,447		)	(2,447		)
Net periodic benefit cost (income)	$	(19	)	$	178		$	(1,267	)	$	(1,253	)