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Employee Retirement Benefits (Tables)
 12 Months Ended
Jan. 31, 2018
Retirement Benefits [Abstract]  
The accumulated benefit obligation The accumulated benefit obligation is as follows:
 
 
For the years ended January 31,
 
 
2018
 
2017
Benefit obligation at beginning of year
 
$
8,416

 
$
7,991

Service cost
 
74

 
80

Interest cost
 
312

 
333

Actuarial loss (gain) and assumption changes
 
112

 
341

Retiree benefits paid
 
(343
)
 
(329
)
Benefit obligation at end of year
 
$
8,571


$
8,416
Schedule of pre-tax accumulated other comprehensive income related to benefit obligation and net periodic benefit cost not yet recognized The following tables set forth the plan's pre-tax adjustment to accumulated other comprehensive income/loss:
 
 
For the years ended January 31,
 
 
2018
 
2017
Amounts not yet recognized in net periodic benefit cost:
 
 
 
 
Net actuarial loss
 
$
2,714

 
$
2,699

Prior service cost
 
(572
)
 
(732
)
Total pre-tax accumulated other comprehensive loss
 
$
2,142

 
$
1,967

 
 
 
 
 
Pre-tax accumulated other comprehensive loss - beginning of year related to benefit obligation
 
$
1,967

 
$
1,612

Reclassification adjustments recognized in benefit cost:
 
 
 
 
Recognized net (loss)
 
(96
)
 
(146
)
Amortization of prior service cost
 
159

 
160

Amounts recognized in AOCI during the year:
 
 
 
 
Net actuarial loss (gain)
 
112

 
341

Pre-tax accumulated other comprehensive loss - end of year related to benefit obligation
 
$
2,142

 
$
1,967
The liability and expense reflected in the balance sheet and income statement The liability and net periodic benefit cost reflected in the Consolidated Balance Sheets and Consolidated Statements of Income and Comprehensive Income were as follows:
 
 
For the years ended January 31,
 
 
2018
 
2017
Beginning liability balance
 
$
8,416

 
$
7,991

Net periodic benefit cost
 
323

 
399

Other comprehensive loss
 
175

 
355

Total recognized in net periodic benefit cost and other comprehensive income
 
498

 
754

Retiree benefits paid
 
(343
)
 
(329
)
Ending liability balance
 
$
8,571

 
$
8,416

 
 
 
 
 
Current portion in accrued liabilities
 
$
307

 
$
362

Long-term portion in other liabilities
 
$
8,264

 
$
8,054

 
 
 
 
 
Assumptions used to calculate benefit obligation:
 
 
 
 
Discount rate
 
3.75
%
 
4.00
%
Rate of compensation increase
 
4.00
%
 
4.00
%
Health care cost trend rates:
 
 
 
 
Health care cost trend rate assumed for next year
 
6.50
%
 
6.67
%
Ultimate health care cost trend rate
 
4.50
%
 
4.50
%
Year that the rate reaches the ultimate trend rate
 
2030

 
2030

Assumptions used to calculated the net periodic benefit cost:
 
 
 
 
Discount rate
 
4.00
%
 
4.25
%
Rate of compensation increase

 
4.00
%
 
4.00
%
Effect of one-percentage-point change in assumed health care cost trend rates The impact of a one-percentage point change in assumed health care rates would have the following effects:
 
 
January 31, 2018
 
 
One-percentage-point increase
 
One-percentage-point decrease
Effect on total of service and interest cost components
 
$
71

 
$
(58
)
Effect on accumulated postretirement benefit obligation
 
$
1,180

 
$
(1,045
)
Schedule of future postretirement other pension benefit payments The following postretirement other than pension benefit payments, which reflect expected future service as appropriate, are expected to be paid:
 
 
2019
 
2020
 
2021
 
2022
 
2023 - 2028
Expected postretirement medical and other benefit payments
 
$
313

 
$
323

 
$
332

 
$
341

 
$
2,192