Pensions and Other Benefit Plans (Tables)

9 Months Ended

Dec. 31, 2012

Pension Plans, Defined Benefit [Member]

Defined Benefit Plan Disclosure [Line Items]

Schedule of Net Benefit Costs [Table Text Block]

		Three months ended				Nine Months Ended
		December 31, 2012				December 31, 2011
		2012		2011		2012		2011
Service costs	$	623	$	846	$	1,869	$	2,537
Interest cost		2,481		2,507		7,443		7,521
Expected return on plan assets		(2,803)		(2,689)		(8,410)		(8,065)
Net amortization		1,558		1,004		4,675		3,012
Curtailment (see below)		-		-		-		1,172
Net periodic pension cost	$	1,859	$	1,668	$	5,577	$	6,177

Other Postretirement Benefit Plans, Defined Benefit [Member]

Defined Benefit Plan Disclosure [Line Items]

Schedule of Net Benefit Costs [Table Text Block]

		Three months ended				Nine Months Ended
		December 31, 2012				December 31, 2011
		2012		2011		2012		2011
Interest cost	$	78	$	120	$	234	$	359
Amortization of plan net losses		36		82		107		246
Net periodic postretirement cost	$	114	$	202	$	341	$	605