Employee Benefit Plans (Tables)

3 Months Ended

Jun. 30, 2012

Employee Benefit Plans [Abstract]

Components of the net periodic benefit cost

	Postretirement Benefits				Pension Plan
	Three Months Ended				Three Months Ended
	June 30, 2012		June 30, 2011		June 30, 2012		June 30, 2011
Interest cost	$	8	$	9	$	35	$	43
Amortization of net loss		2		4		—		—
Net periodic cost	$	10	$	13	$	35	$	43