Employee Benefit Plans (Tables)

6 Months Ended

Sep. 30, 2015

Compensation And Retirement Disclosure [Abstract]

Components of Net Periodic Benefit Cost

The following tables provide the components of the net periodic benefit cost.

	Postretirement Benefits
	Three Months Ended				Six Months Ended
	September 30, 2015		September 30, 2014		September 30, 2015		September 30, 2014
Interest cost	$	4	$	5	$	9	$	11
Amortization of net (gain) loss		—		—		—		—
Net periodic cost	$	4	$	5	$	9	$	11

	Pension Plan
	Three Months Ended				Six Months Ended
	September 30, 2015		September 30, 2014		September 30, 2015		September 30, 2014
Interest cost	$	13	$	28	$	26	$	57
Amortization of net loss		9		3		18		5
Net periodic cost	$	22	$	31	$	44	$	62