Pension and Postretirement Benefits (Tables)

6 Months Ended

Sep. 30, 2013

Pension and Other Postretirement Benefit Expense [Abstract]

Schedule of Net Periodic Benefit Cost Not yet Recognized

Net periodic pension cost for continuing operations consisted of the following:

	Three Months Ended September 30,						Six Months Ended September 30,
	2013			2012			2013			2012
Service cost	$	530		$	511		1,078			$	1,023
Interest expense	1,662			1,842			3,383			3,684
Expected return on plan assets	(1,519		)	(1,571		)	(3,037		)	(3,140		)
Amortization of prior service cost	49			55			102			110
Actuarial loss	760			500			1,517			998
Curtailment loss	—			—			77			—
Special termination benefit	—			—			1,184			—
Net periodic pension cost	$	1,482		$	1,337		$	4,304		$	2,675

Schedule of Net Periodic Benefit Cost, Post Employment Benefits

Net periodic benefit cost for postretirement health and life insurance benefit plans consisted of the following:

	Three Months Ended September 30,						Six Months Ended September 30,
	2013			2012			2013			2012
Service cost	$	17		$	15		33			$	31
Interest expense	142			157			284			314
Amortization of prior service cost	(410		)	(410		)	(820		)	(821		)
Actuarial loss	123			117			246			234
Net periodic pension (benefit)	$	(128	)	$	(121	)	$	(257	)	$	(242	)