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Retirement plans Defined pension disclosure (Tables)
 12 Months Ended
Jan. 31, 2015
Defined Benefit Plan Disclosure [Line Items]  
Schedule of Defined Benefit Plans Disclosures [Table Text Block]

Reconciliation of benefit obligations, plan assets and funded status of plan
2014

2013

Accumulated benefit obligations
 
 
Vested benefits
$7,626
$6,243
Accumulated benefits
$8,129
$6,827
 
 
 
Change in benefit obligation
 
 
Benefit obligation - beginning of year
$6,827
$7,240
Service cost
—

78

Interest cost
299

293

Actuarial (gain) loss
1,249

(539
)
Benefits paid
(246
)
(245
)
Benefit obligation - end of year
$8,129
$6,827
 
 
 
Change in plan assets
 
 
Fair value of plan assets - beginning of year
$6,351
$6,065
Actual gain on plan assets
63

531

Benefits paid
(246
)
(245
)
Fair value of plan assets - end of year
$6,168
$6,351
 
 
 
Unfunded status
$(1,961)
$(476)
 
 
 
Balance sheet classification
 
 
Current assets
$352
$335
Other assets
1,163

1,038

Other long-term liabilities
(3,476
)
(1,849
)
Net amount recognized
$(1,961)
$(476)
 
 
 
Amounts recognized in accumulated other comprehensive loss
 
 
Unrecognized actuarial loss
$3,124
$1,513
Net amount recognized
$3,124
$1,513