Employee Postretirement Benefits (Tables)

3 Months Ended

Apr. 30, 2014

Compensation and Retirement Disclosure [Abstract]

Components of net periodic benefit cost for postretirement benefits

The components of net periodic benefit cost for postretirement benefits are as follows:

	Three Months Ended
	April 30, 2014		April 30, 2013
Service cost	$	49	$	50
Interest cost	91		87
Amortization of actuarial losses	38		46
Net periodic benefit cost	$	178	$	183