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Retirement plans Defined pension disclosure (Tables) | 12 Months Ended
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Jan. 31, 2017
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 | 2016 |  | 2015 |
Accumulated benefit obligations |  |
Vested benefits | $6,500 | $6,587
Accumulated benefits | $6,500 | $7,020
Change in benefit obligation |  |
Benefit obligation - beginning of year | $7,020 | $8,129
Interest cost | 278 |  | 266 |
Actuarial gain | (493 | ) | (1,115 | )
Benefits paid | (305 | ) | (260 | )
Benefit obligation - end of year | $6,500 | $7,020
Change in plan assets |  |
Fair value of plan assets - beginning of year | $5,883 | $6,168
Actual gain (loss) on plan assets | 650 |  | (25 | )
Benefits paid | (305 | ) | (260 | )
Fair value of plan assets - end of year | $6,228 | $5,883
Unfunded status | $(272) | $(1,137)
Balance sheet classification |  |
Prepaid expenses and other current assets | $348 | $326
Other assets | 1,201 |  | 1,166 |
Deferred compensation liabilities | (1,821 | ) | (2,629 | )
Net amount recognized | $(272) | $(1,137)
Amounts recognized in accumulated other comprehensive loss |  |
Unrecognized actuarial loss | $1,472 | $2,303
Net amount recognized | $1,472 | $2,303

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- Definition Tabular disclosure of one or more of the entity's defined benefit pension plans or one or more other defined benefit postretirement plans, separately for pension plans and other postretirement benefit plans including the entity's schedule of fair value of plan assets for defined benefit or other postretirement plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e2439-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e2417-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e2410-114920 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=73719040&loc=d3e4179-114921 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 + Details
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