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Retirement Plans (Tables) | 3 Months Ended
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Apr. 30, 2017
Retirement Benefits [Abstract] |
Schedule of Defined Benefit Plans Disclosures | The net periodic pension cost (income) for the Pension Plan, the VIP Plan, and the Non-Employee Directors Retirement Plan for the three months ended April 30, 2017 and 2016 were as follows (in thousands):
| Three Months Ended
| Pension Plan |  | VIP Plan |  | Non-Employee Directors Retirement Plan
4/30/2017 |  | 4/30/2016 |  | 4/30/2017 |  | 4/30/2016 |  | 4/30/2017 |  | 4/30/2016
Service cost | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Interest cost | 304 |  |  | 296 |  |  | 89 |  |  | 90 |  |  | 9 |  |  | 3 |
Expected return on plan assets | (342 | ) |  | (284 | ) |  | — |  |  | — |  |  | — |  |  | — |
Amortization of transition amount | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Recognized (gain) loss due to Curtailments | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Amortization of prior service cost | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Recognized net actuarial (gain) loss | 179 |  |  | 291 |  |  | 60 |  |  | 77 |  |  | — |  |  | (29 | )
Benefit cost | $ | 141 |  |  | $ | 303 |  |  | $ | 149 |  |  | $ | 167 |  |  | $ | 9 |  |  | $ | (26 | )

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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=82843861&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=82843861&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=82843861&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=77993564&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=82843861&loc=d3e1928-114920 + Details
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