Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Notes)	3 Months Ended
Apr. 30, 2017
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES There have been no material changes to the Company's significant accounting policies as described in the Company's Annual Report on Form 10-K for the fiscal year ended January 31, 2017 other than described below in the Accounting Standards Adopted section. Accounting Pronouncements Accounting Standards Adopted In January 2017 the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2017-04, "Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment" (ASU 2017-04). This ASU removes Step 2 of the goodwill impairment test, which requires a hypothetical purchase price allocation. Under the new guidance, a goodwill impairment will be measured as the amount by which a reporting unit’s carrying value exceeds its fair value. The amount of any impairment may not exceed the carrying amount of goodwill. The amendments should be applied on a prospective basis. The Company early adopted this guidance in fiscal 2018 first quarter on a prospective basis. As discussed in Note 6 Goodwill, Long-lived Assets, and Other Intangibles, management performed an assessment in fiscal 2018 first quarter and determined no triggering events had occurred for any of its three reporting units; therefore, the adoption of this guidance did not have any impact on the consolidated financial statements or the results of operations as of and for the three-month period ended April 30, 2017. In March 2016 the FASB issued ASU 2016-09, "Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting" (ASU 2016-09). ASU 2016-09 amends the accounting for employee share-based payment transactions to require recognition of the tax effects resulting from the settlement of stock-based awards as discrete income tax expense or benefit in the income statement in the reporting period in which they occur. This guidance also requires that all tax-related cash flows resulting from share-based awards be disclosed as operating cash flows in the statement of cash flows and that cash paid to taxing authorities on the behalf of employees for withheld shares be classified as a financing activity in the statement of cash flows. Finally, this ASU allows companies to make an accounting policy election to either estimate the number of awards that are expected to vest, consistent with current GAAP, or account for forfeitures when they occur. The Company adopted the new guidance in fiscal 2018 first quarter when it became effective. The Company accounts for forfeitures as they occur. The Company is prospectively recognizing excess tax benefits or deficits on vesting or settlement of awards, when they occur, as a discrete income tax benefit or expense instead of as additional paid-in capital as required under previous guidance. This change resulted in recognition of income tax expense of $479 for the three months ended April 30, 2017. These tax-related cash flows are now classified within operating activities. The Company classifies tax payments made to taxing authorities on the employee's behalf for withheld shares as a financing activity on the statement of cash flows, as such the adoption of this guidance had no impact. Under the new guidance, excess tax benefits are no longer included in assumed proceeds under the treasury stock method of calculating earnings per share. The increase in incremental shares used in the weighted average diluted shares calculation was not material to the Company's diluted earnings per share calculation. In July 2015 the FASB issued ASU No. 2015-11, "Inventory (Topic 330) Simplifying the Measurement of Inventory" (ASU 2015-11). The amendments in ASU 2015-11 clarify that an entity should measure inventory within the scope of this update at the lower of cost and net realizable value. Net realizable value is the estimated selling price in the ordinary course of business, less reasonably predictable costs of completion, disposal, and transportation. Substantial and unusual losses that result from subsequent measurement of inventory should be disclosed in the financial statements. The Company adopted this guidance on a prospective basis in fiscal 2018 first quarter when it became effective. Previously the Company reported its inventory at the lower of cost or market. Market was defined as replacement cost with a ceiling of net realizable value and a floor of net realizable value less a normal profit margin. The Company evaluates its inventory in all three reporting segments quarterly to determine if cost exceeds net realizable value and records a write-down, if necessary. The adoption of this guidance did not have any impact on the consolidated financial statements or the results of operations as of and for the three-month period ended April 30, 2017. New Accounting Standards Not Yet Adopted In March 2017, the FASB issued ASU No. 2017-07, "Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Postretirement Benefit Cost" (ASU 2017-07). The guidance clarifies where the cost components of the net benefit cost should be reported in the income statement and it allows only the service cost to be capitalized. Currently the Company reports all of the components of the net benefit cost in "Operating income" in the Consolidated Statement of Income and Comprehensive Income. The net benefit cost for participants that are active employees is reported in the same manner as each participant's compensation cost is classified in the Consolidated Statement of Income and Comprehensive Income. The net benefit cost attributable to retired (inactive) participants is reported in "Selling, general, and administrative expenses" in the Consolidated Statement of Income and Comprehensive Income. Under the new guidance only the service cost component of the net benefit cost will be classified the same as the participant's compensation cost. The other components of the net benefit cost are required to be reported separately as a non-operating income (expense). The guidance is effective for annual periods, including interim periods, in fiscal years beginning after December 15, 2017. Early adoption is permitted and the amendments should be applied retrospectively. The Company does not expect this guidance will have a significant impact on its consolidated financial statements, results of operations and disclosures since it primarily will only change how the net benefit cost is classified in the Company's Consolidated Statements of Income and Comprehensive Income. In February 2016 the FASB issued ASU No. 2016-02, "Leases (Topic 842)" (ASU 2016-02). The primary difference between previous GAAP and ASU 2016-02 is the recognition of lease assets and lease liabilities by lessees for those leases classified as operating leases under previous GAAP. The guidance requires a lessee to recognize in the statement of financial position a liability to make lease payments (the lease liability) and a right-of-use asset representing its right to use the underlying asset for the lease term. When measuring assets and liabilities arising from a lease, a lessee (and a lessor) should include payments to be made in optional periods only if the lessee is reasonably certain to exercise an option to extend the lease or not to exercise an option to terminate the lease. Similarly, optional payments to purchase the underlying asset should be included in the measurement of lease assets and lease liabilities only if the lessee is reasonably certain to exercise that purchase option. For leases with a term of 12 months or less, a lessee is permitted to make an accounting policy election by class of underlying asset not to recognize lease assets and lease liabilities. If a lessee makes this election, it should recognize lease expense for such leases generally on a straight-line basis over the lease term. ASU 2016-02 is effective for fiscal years beginning after December 15, 2018. Lessees and lessors are required to recognize and measure leases at the beginning of the earliest period presented using a modified retrospective approach. The modified retrospective approach includes a number of optional practical expedients that entities may elect to apply. An entity that elects to apply the practical expedients will, in effect, continue to account for leases that commence before the effective date in accordance with previous GAAP unless the lease is modified, except that lessees are required to recognize a right-of-use asset and a lease liability for all operating leases at each reporting date based on the present value of the remaining minimum rental payments that were tracked and disclosed under previous GAAP. The Company is evaluating the impact the adoption of this guidance will have on its consolidated financial statements, results of operations, and disclosures. In May 2014 the FASB issued ASU No. 2014-09, "Revenue from Contracts with Customers (Topic 606)" (ASU 2014-09). ASU 2014-09 provides a comprehensive new recognition model that requires recognition of revenue when a company transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to receive in exchange for those goods or services. This guidance supersedes the revenue recognition requirements in FASB ASC Topic 605, "Revenue Recognition," and most industry-specific guidance. ASU 2014-09 defines a five-step process to achieve this core principle and, in doing so, companies will need to use more judgment and make more estimates than under the current guidance. It also requires additional disclosure about the nature, amount, timing, and uncertainty of revenue and cash flows arising from customer contracts. In August 2015, the FASB approved a one-year deferral of the effective date (ASU 2015-14) and the standard is now effective for the Company for fiscal 2019 and interim periods therein. ASU 2014-09 may be adopted as of the original effective date, which for the Company is fiscal 2018. The guidance may be applied using either of the following transition methods: (i) a full retrospective approach reflecting the application of the standard in each prior reporting period with the option to elect certain practical expedients or (ii) a retrospective approach with the cumulative effect of initially adopting ASU 2014-09 recognized at the date of adoption (which includes additional footnote disclosures). In addition, FASB has amended Topic 606 prior to it becoming effective. The effective date and transition requirements for these amendments to Topic 606 are the same as ASU 2014-09. Management has designated a team to assess the Company's revenue streams to determine what, if any, impact the new standard will have on revenue recognition. The Company's evaluation of ASU 2014-09, and all subsequent amendments to Topic 606, is ongoing and no conclusions have been reached on the method and date of adoption or the impact the adoption will have on the Company’s consolidated financial position, results of operations, and associated disclosures.

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

There have been no material changes to the Company's significant accounting policies as described in the Company's Annual Report on Form 10-K for the fiscal year ended January 31, 2017 other than described below in the Accounting Standards Adopted section.

Accounting Pronouncements

Accounting Standards Adopted

In January 2017 the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2017-04, "Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment" (ASU 2017-04). This ASU removes Step 2 of the goodwill impairment test, which requires a hypothetical purchase price allocation. Under the new guidance, a goodwill impairment will be measured as the amount by which a reporting unit’s carrying value exceeds its fair value. The amount of any impairment may not exceed the carrying amount of goodwill. The amendments should be applied on a prospective basis. The Company early adopted this guidance in fiscal 2018 first quarter on a prospective basis. As discussed in Note 6 Goodwill, Long-lived Assets, and Other Intangibles, management performed an assessment in fiscal 2018 first quarter and determined no triggering events had occurred for any of its three reporting units; therefore, the adoption of this guidance did not have any impact on the consolidated financial statements or the results of operations as of and for the three-month period ended April 30, 2017.

In March 2016 the FASB issued ASU 2016-09, "Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting" (ASU 2016-09). ASU 2016-09 amends the accounting for employee share-based payment transactions to require recognition of the tax effects resulting from the settlement of stock-based awards as discrete income tax expense or benefit in the income statement in the reporting period in which they occur. This guidance also requires that all tax-related cash flows resulting from share-based awards be disclosed as operating cash flows in the statement of cash flows and that cash paid to taxing authorities on the behalf of employees for withheld shares be classified as a financing activity in the statement of cash flows. Finally, this ASU allows companies to make an accounting policy election to either estimate the number of awards that are expected to vest, consistent with current GAAP, or account for forfeitures when they occur. The Company adopted the new guidance in fiscal 2018 first quarter when it became effective. The Company accounts for forfeitures as they occur. The Company is prospectively recognizing excess tax benefits or deficits on vesting or settlement of awards, when they occur, as a discrete income tax benefit or expense instead of as additional paid-in capital as required under previous guidance. This change resulted in recognition of income tax expense of $479 for the three months ended April 30, 2017. These tax-related cash flows are now classified within operating activities. The Company classifies tax payments made to taxing authorities on the employee's behalf for withheld shares as a financing activity on the statement of cash flows, as such the adoption of this guidance had no impact. Under the new guidance, excess tax benefits are no longer included in assumed proceeds under the treasury stock method of calculating earnings per share. The increase in incremental shares used in the weighted average diluted shares calculation was not material to the Company's diluted earnings per share calculation.

In July 2015 the FASB issued ASU No. 2015-11, "Inventory (Topic 330) Simplifying the Measurement of Inventory" (ASU 2015-11). The amendments in ASU 2015-11 clarify that an entity should measure inventory within the scope of this update at the lower of cost and net realizable value. Net realizable value is the estimated selling price in the ordinary course of business, less reasonably predictable costs of completion, disposal, and transportation. Substantial and unusual losses that result from subsequent measurement of inventory should be disclosed in the financial statements. The Company adopted this guidance on a prospective basis in fiscal 2018 first quarter when it became effective. Previously the Company reported its inventory at the lower of cost or market. Market was defined as replacement cost with a ceiling of net realizable value and a floor of net realizable value less a normal profit margin. The Company evaluates its inventory in all three reporting segments quarterly to determine if cost exceeds net realizable value and records a write-down, if necessary. The adoption of this guidance did not have any impact on the consolidated financial statements or the results of operations as of and for the three-month period ended April 30, 2017.

New Accounting Standards Not Yet Adopted

In March 2017, the FASB issued ASU No. 2017-07, "Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Postretirement Benefit Cost" (ASU 2017-07). The guidance clarifies where the cost components of the net benefit cost should be reported in the income statement and it allows only the service cost to be capitalized. Currently the Company reports all of the components of the net benefit cost in "Operating income" in the Consolidated Statement of Income and Comprehensive Income. The net benefit cost for participants that are active employees is reported in the same manner as each participant's compensation cost is classified in the Consolidated Statement of Income and Comprehensive Income. The net benefit cost attributable to retired (inactive) participants is reported in "Selling, general, and administrative expenses" in the Consolidated Statement of Income and Comprehensive Income. Under the new guidance only the service cost component of the net benefit cost will be classified the same as the participant's compensation cost. The other components of the net benefit cost are required to be reported separately as a non-operating income (expense). The guidance is effective for annual periods, including interim periods, in fiscal years beginning after December 15, 2017. Early adoption is permitted and the amendments should be applied retrospectively. The Company does not expect this guidance will have a significant impact on its consolidated financial statements, results of operations and disclosures since it primarily will only change how the net benefit cost is classified in the Company's Consolidated Statements of Income and Comprehensive Income.

In February 2016 the FASB issued ASU No. 2016-02, "Leases (Topic 842)" (ASU 2016-02). The primary difference between previous GAAP and ASU 2016-02 is the recognition of lease assets and lease liabilities by lessees for those leases classified as operating leases under previous GAAP. The guidance requires a lessee to recognize in the statement of financial position a liability to make lease payments (the lease liability) and a right-of-use asset representing its right to use the underlying asset for the lease term. When measuring assets and liabilities arising from a lease, a lessee (and a lessor) should include payments to be made in optional periods only if the lessee is reasonably certain to exercise an option to extend the lease or not to exercise an option to terminate the lease. Similarly, optional payments to purchase the underlying asset should be included in the measurement of lease assets and lease liabilities only if the lessee is reasonably certain to exercise that purchase option. For leases with a term of 12 months or less, a lessee is permitted to make an accounting policy election by class of underlying asset not to recognize lease assets and lease liabilities. If a lessee makes this election, it should recognize lease expense for such leases generally on a straight-line basis over the lease term. ASU 2016-02 is effective for fiscal years beginning after December 15, 2018. Lessees and lessors are required to recognize and measure leases at the beginning of the earliest period presented using a modified retrospective approach. The modified retrospective approach includes a number of optional practical expedients that entities may elect to apply. An entity that elects to apply the practical expedients will, in effect, continue to account for leases that commence before the effective date in accordance with previous GAAP unless the lease is modified, except that lessees are required to recognize a right-of-use asset and a lease liability for all operating leases at each reporting date based on the present value of the remaining minimum rental payments that were tracked and disclosed under previous GAAP. The Company is evaluating the impact the adoption of this guidance will have on its consolidated financial statements, results of operations, and disclosures.

In May 2014 the FASB issued ASU No. 2014-09, "Revenue from Contracts with Customers (Topic 606)" (ASU 2014-09). ASU 2014-09 provides a comprehensive new recognition model that requires recognition of revenue when a company transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to receive in exchange for those goods or services. This guidance supersedes the revenue recognition requirements in FASB ASC Topic 605, "Revenue Recognition," and most industry-specific guidance. ASU 2014-09 defines a five-step process to achieve this core principle and, in doing so, companies will need to use more judgment and make more estimates than under the current guidance. It also requires additional disclosure about the nature, amount, timing, and uncertainty of revenue and cash flows arising from customer contracts. In August 2015, the FASB approved a one-year deferral of the effective date (ASU 2015-14) and the standard is now effective for the Company for fiscal 2019 and interim periods therein. ASU 2014-09 may be adopted as of the original effective date, which for the Company is fiscal 2018. The guidance may be applied using either of the following transition methods: (i) a full retrospective approach reflecting the application of the standard in each prior reporting period with the option to elect certain practical expedients or (ii) a retrospective approach with the cumulative effect of initially adopting ASU 2014-09 recognized at the date of adoption (which includes additional footnote disclosures). In addition, FASB has amended Topic 606 prior to it becoming effective. The effective date and transition requirements for these amendments to Topic 606 are the same as ASU 2014-09. Management has designated a team to assess the Company's revenue streams to determine what, if any, impact the new standard will have on revenue recognition. The Company's evaluation of ASU 2014-09, and all subsequent amendments to Topic 606, is ongoing and no conclusions have been reached on the method and date of adoption or the impact the adoption will have on the Company’s consolidated financial position, results of operations, and associated disclosures.