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Defined Benefit Plans (Tables) | 9 Months Ended
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Oct. 31, 2015
Compensation and Retirement Disclosure [Abstract] |
Components of net periodic defined benefit pension cost | The components of net periodic defined benefit pension cost for the three and nine months ended October 31, 2015 and November 1, 2014 related to the SERP are as follows (in thousands):
| Three Months Ended |  | Nine Months Ended
| Oct 31, 2015 |  | Nov 1, 2014 |  | Oct 31, 2015 |  | Nov 1, 2014
Interest cost | $ | 498 |  |  | $ | 573 |  |  | $ | 1,489 |  |  | $ | 1,717 |
Net amortization of unrecognized prior service credit | — |  |  | (58 | ) |  | (97 | ) |  | (174 | )
Net amortization of actuarial losses | 11 |  |  | 234 |  |  | 729 |  |  | 703 |
Curtailment gain | — |  |  | — |  |  | (1,651 | ) |  | — |
Net periodic defined benefit pension cost | $ | 509 |  |  | $ | 749 |  |  | $ | 470 |  |  | $ | 2,246 |

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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920 + Details
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