Annual report pursuant to Section 13 and 15(d)

Employee Benefit Plans - Details of Weighted Average Assumptions Used in the Accounting for the Pension Plan (Detail)

v3.8.0.1
Employee Benefit Plans - Details of Weighted Average Assumptions Used in the Accounting for the Pension Plan (Detail)
Jan. 31, 2017
Defined Benefit Pension Plans And Defined Benefit Postretirement Plans Disclosure [Abstract]  
Discount rate 5.72%
Compensation increase rate 5.00%