Goodwill Impairment Loss and Other Charges Goodwill Impairment Loss and Other Charges (Notes)	9 Months Ended
	Oct. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill Impairment Loss and Other Charges	GOODWILL IMPAIRMENT LOSS AND OTHER CHARGES Pre-contract Deferred Cost Write-offs From time to time, the Company incurs costs before a contract is finalized and such pre-contract costs are deferred to the balance sheet to the extent they relate to a specific project and the Company has concluded that is probable that the contract will be awarded for more than the amount deferred. Pre-contract cost deferrals are common with Vista's business pursuits. As described in Note 2 Summary of Significant Accounting Policies, Vista has been pursuing international opportunities and was in the process of negotiating a large international contract that did not materialize in the fiscal 2016 third quarter as expected. Expectations were lowered as the timing and likelihood of completing certain international pursuits became less certain. While the Company continues to pursue international opportunities, it is not likely that major contracts will be successfully executed within the next twelve months as previously expected. Corresponding to these lower expectations, the pre-contract costs associated with these pursuits were written off during the fiscal 2016 third quarter. Vista recorded a charge of $2,933, (which is comprised of $2,075 of costs capitalized as of July 31, 2015 and additional costs of $858 capitalized during August and September 2015) for the write-off of these pre-contract costs. This charge is recorded in “Cost of sales” in the Consolidated Statements of Income and Comprehensive Income. Goodwill Impairment Loss In the fiscal 2016 third quarter the Company determined that a triggering event occurred for its Vista reporting unit, a subsidiary of the Aerostar division. The triggering event was caused by the lowering of financial expectations for sales and operating income of the reporting unit due to delays and uncertainties regarding the reporting unit’s pursuit of large international opportunities, one of which was expected to be awarded during the quarter. In addition, the Company made a change in the executive leadership of the reporting unit during the quarter. As previously discussed, the Step 1 impairment analysis was completed using fair value techniques as of October 31, 2015. In determining the estimated fair value of the Vista reporting unit, the Company was required to estimate a number of factors, including projected revenue growth rates, projected operating results, terminal growth rates, economic conditions, anticipated future cash flows, and the discount rate. On the basis of these estimates, the October 31, 2015 analysis indicated that the estimated fair value of the Vista reporting unit was less than the carrying value. The carrying value exceeded the estimated fair value by $8,357, or 35.0%. Pursuant to the applicable accounting guidance, the Company performed a Step 2 impairment analysis. In the Step 2 impairment analysis, the fair value determined was allocated to the assets and liabilities of the reporting unit. The resulting implied fair value of the Vista goodwill was $4,084 compared to the carrying value recorded for the reporting unit, $11,497. This $7,413 shortfall was recorded in the current quarter as an impairment charge to operating income reported as "Goodwill impairment loss" in the Consolidated Statements of Income and Comprehensive Income. There were no impairment losses reported in the three- or nine-month periods ended October 31, 2014 nor were there any accumulated impairment losses prior to October 31, 2015. Goodwill gross and net of accumulated impairment losses at October 31, 2015 was $52,209 and $44,796, respectively. Goodwill gross and net of accumulated impairment losses at October 31, 2014 was $25,234.

The entire disclosure for the aggregate amount of goodwill and a description of intangible assets, which may include (a) for amortizable intangible assets (also referred to as finite-lived intangible assets), the carrying amount, the amount of any significant residual value, and the weighted-average amortization period, (b) for intangible assets not subject to amortization (also referred to as indefinite-lived intangible assets), the carrying amount, and (c) the amount of research and development assets acquired and written off in the period, including the line item in the income statement in which the amounts written off are aggregated, if not readily apparent from the income statement. Also discloses (a) for amortizable intangibles assets in total and by major class, the gross carrying amount and accumulated amortization, the total amortization expense for the period, and the estimated aggregate amortization expense for each of the five succeeding fiscal years, (b) for intangible assets not subject to amortization the carrying amount in total and by major class, and (c) for goodwill, in total and for each reportable segment, the changes in the carrying amount of goodwill during the period (including the aggregate amount of goodwill acquired, the aggregate amount of impairment losses recognized, and the amount of goodwill included in the gain (loss) on disposal of a reporting unit). If any part of goodwill has not been allocated to a reportable segment, discloses the unallocated amount and the reasons for not allocating. For each impairment loss recognized related to an intangible asset (excluding goodwill), discloses: (a) a description of the impaired intangible asset and the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method for determining fair value, (c) the caption in the income statement or the statement of activities in which the impairment loss is aggregated, and (d) the segment in which the impaired intangible asset is reported. For each goodwill impairment loss recognized, discloses: (a) a description of the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method of determining the fair value of the associated reporting unit, and (c) if a recognized impairment loss is an estimate not finalized and the reasons why the estimate is not final. May also disclose the nature and amount of any significant adjustments made to a previous estimate of an impairment loss.