Employee Benefit Plans (Tables)

9 Months Ended

Dec. 31, 2014

Compensation and Retirement Disclosure [Abstract]

Components of net postretirement medical expense

The components of net postretirement medical expense for the Officer Medical Plan were as follows:

	Three Months Ended December 31,				Nine Months Ended December 31,
	2014		2013		2014		2013
Service cost	$	1,022	$	1,186	$	3,064	$	3,559
Interest cost	892		921		2,676		2,751
Net actuarial loss	145		704		436		2,068
Total postretirement medical expense	$	2,059	$	2,811	$	6,176	$	8,378