Goodwill and Other Intangibles Goodwill and Other Intangibles (Notes)	9 Months Ended
Oct. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill Impairment Loss and Other Charges	GOODWILL, LONG-LIVED ASSETS 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 within the Aerostar Division, particularly with the aerostat and radar business pursuits. Aerostar had 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 other international pursuits became less certain. Corresponding to these lower expectations, the pre-contract costs associated with these pursuits were written off during the fiscal 2016 third quarter. The Aerostar Division 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. The pre-contract costs deferred to the balance sheet at October 31, 2016 were not material and there have been no write-offs in the three- and nine-month periods ended October 31, 2016, respectively. Inventory write-downs During the fiscal 2017 third quarter, the Company wrote-down radar inventory, purchased primarily during fiscal 2016, due to the Company's decision in the fiscal 2017 third quarter to no longer actively pursue certain radar opportunities. The decision to write-down for this inventory is consistent with the triggering event identified during the fiscal 2017 third quarter relating to the Aerostar reporting unit and the radar product and radar services (Radar) asset group. This radar specific inventory write-down increased "Cost of sales" by $2,278 for the three- and nine-month periods ended October 31, 2016. There were no specific radar inventory write-downs for the three- and nine-month periods ended October 31, 2015. Goodwill and Goodwill Impairment Loss The Company performs impairment reviews of goodwill by reporting unit. At the end of fiscal 2016, the Company determined it had four reporting units: Engineered Films Division; Applied Technology Division; and two separate reporting units in the Aerostar Division, one of which was Vista and one of which was all other Aerostar operations (Aerostar excluding Vista). During the first quarter of fiscal 2017, management implemented managerial and financial reporting changes within Vista and Aerostar to further integrate Vista into the Aerostar Division. Integration actions included leadership re-alignment, including selling and business development leadership functions, re-deployment of employees across the division, and consolidation of administrative functions, among other actions. Based on the changes made, the Company consolidated the two separate reporting units within the Aerostar Division into one reporting unit for the purposes of goodwill impairment review. As such, as of April 30, 2016, the Company has three reporting units: Engineered Films Division, Applied Technology Division, and Aerostar Division. The Company reviewed the quantitative and qualitative factors associated with the change in reporting unit and determined there were no indicators of impairment at the time of the reporting unit change. In the fiscal 2017 third quarter the Company determined that a triggering event occurred for its Aerostar reporting unit, which had $789 of goodwill as of October 31, 2016. The triggering event was caused by lowering the financial expectations for net sales and operating income of the reporting unit and certain asset groups due to delays and uncertainties regarding the reporting unit’s pursuit of certain opportunities, including aerostat orders, certain classified stratospheric balloon pursuits, and radar pursuits. Aerostar is still actively pursuing these opportunities and some are in active negotiations, but the timing of certain aerostat and classified stratospheric balloon opportunities are being delayed more than previously expected and the likelihood of radar sales is lower due to the Company's decision to no longer actively pursue certain radar product opportunities. The Step 1 impairment analysis was completed using fair value techniques as of October 31, 2016. In determining the estimated fair value of the Aerostar 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, 2016 analysis indicated that the estimated fair value of the Aerostar reporting unit exceeded the reporting unit carrying value by approximately $9,000, or approximately 30.0%. As described in our Annual Report on Form 10-K/A for the fiscal year ended January 31, 2016, the Company determined that a triggering event occurred for its Vista reporting unit, a subsidiary of the Aerostar Division, during the fiscal 2016 third quarter. A Step 1 impairment analysis was completed using fair value techniques as of October 31, 2015 and it was determined that the estimated fair value of the Vista reporting unit was less than the carrying value. Pursuant to the applicable accounting guidance, the Company performed a Step 2 impairment analysis. Based on this Step 2 impairment analysis the resulting implied fair value of the Vista goodwill was determined to have no value compared to the $11,497 carrying value recorded for the reporting unit. This $11,497 shortfall was recorded in the prior fiscal year third quarter as an impairment charge to operating income reported as "Goodwill impairment loss" in the Consolidated Statements of Income and Comprehensive Income. The Company reported $11,497 in goodwill impairment losses for the three- and nine-month periods ended October 31, 2015. Goodwill gross and net of accumulated impairment losses at October 31, 2015 was $52,209 and $40,712, respectively. The Company's cumulative impairment loss recorded as of October 31, 2015 was $11,497. The Company reported no impairment losses for the three- and nine-month periods ended October 31, 2016. Goodwill gross and net of accumulated impairment losses at October 31, 2016 was $52,200 and $40,703, respectively. The Company's cumulative impairment loss recorded as of October 31, 2016 was $11,497. Long-Lived Asset Impairment Loss Fiscal 2017 third quarter assessment The Company evaluated the triggering events described in the goodwill impairment analysis and determined there were also triggering events with respect to the assets associated with the aerostat and stratospheric programs (Lighter than Air) and Radar asset groups in the Aerostar reporting unit in the third quarter, which resulted in an asset impairment test. Using the sum of the undiscounted cash flows associated with each of the two asset groups, a Step 1 test was performed for each asset group. The undiscounted cash flows for the Lighter than Air asset group exceeded the carrying value of the long-lived assets by approximately $110,000, or 800%, and no Step 2 test was deemed to be necessary based on the recoverability of the long-lived assets. For the Radar asset group, however, the undiscounted cash flows did not exceed the carrying value of the long-lived assets and the Company performed a Step 2 impairment analysis for the long-lived assets. In the Step 2 impairment analysis, the fair value determined was allocated to the assets and liabilities of the Radar asset group. The resulting estimated fair value of the Radar asset group long-lived assets was $175 compared to the carrying value of $262 for the asset group. The shortfall of $87 was recorded in the fiscal 2017 third quarter as an impairment charge to operating income reported as "Long-lived asset impairment loss" in the Consolidated Statements of Income and Comprehensive Income. The total impairment loss related to property, plant, and equipment and patents was $62 and $25, respectively. Fiscal 2016 third quarter assessment As described in our Annual Report on Form 10-K/A for the fiscal year ended January 31, 2016, the Company determined that the relevant cash flows for long-lived asset testing (the lowest level of cash flows that are largely independent of other assets) are one level below the Vista reporting unit. For Vista, these levels were determined to be asset groups identified for the client private business (CP) and Radar. Based on the assessment of the forecasts of cash flows and these asset groups, the Company concluded that certain long-lived assets of the Vista reporting unit, including finite-lived intangible assets, were impaired as of October 31, 2015. Using the sum of the undiscounted cash flows associated with each of the two asset groups, a Step 1 test was performed for each asset group. The undiscounted cash flows for the CP asset group exceeded the carrying value of the long-lived assets and no Step 2 test was deemed to be necessary based on the recoverability of the long-lived assets. For the Radar asset group, however, the undiscounted cash flows did not exceed the carrying value of the long-lived assets, resulting in an estimated fair value of the Radar asset group long-lived assets of $103 compared to the carrying value of $3,916 for the asset group. The shortfall of $3,813 was recorded in fiscal 2016 third quarter as an impairment charge to operating income reported as "Long-lived asset impairment loss" in the Consolidated Statements of Income and Comprehensive Income. Of the total long-lived asset impairment of $3,813, $3,154 was related to amortizable intangible assets related to radar technology and radar customers, $554 was related to property, plant, and equipment, and $105 was related to patents.

GOODWILL, LONG-LIVED ASSETS 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 within the Aerostar Division, particularly with the aerostat and radar business pursuits. Aerostar had 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 other international pursuits became less certain. Corresponding to these lower expectations, the pre-contract costs associated with these pursuits were written off during the fiscal 2016 third quarter. The Aerostar Division 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. The pre-contract costs deferred to the balance sheet at October 31, 2016 were not material and there have been no write-offs in the three- and nine-month periods ended October 31, 2016, respectively.

Inventory write-downs

During the fiscal 2017 third quarter, the Company wrote-down radar inventory, purchased primarily during fiscal 2016, due to the Company's decision in the fiscal 2017 third quarter to no longer actively pursue certain radar opportunities. The decision to write-down for this inventory is consistent with the triggering event identified during the fiscal 2017 third quarter relating to the Aerostar reporting unit and the radar product and radar services (Radar) asset group. This radar specific inventory write-down increased "Cost of sales" by $2,278 for the three- and nine-month periods ended October 31, 2016. There were no specific radar inventory write-downs for the three- and nine-month periods ended October 31, 2015.

Goodwill and Goodwill Impairment Loss

The Company performs impairment reviews of goodwill by reporting unit. At the end of fiscal 2016, the Company determined it had four reporting units: Engineered Films Division; Applied Technology Division; and two separate reporting units in the Aerostar Division, one of which was Vista and one of which was all other Aerostar operations (Aerostar excluding Vista).

During the first quarter of fiscal 2017, management implemented managerial and financial reporting changes within Vista and Aerostar to further integrate Vista into the Aerostar Division. Integration actions included leadership re-alignment, including selling and business development leadership functions, re-deployment of employees across the division, and consolidation of administrative functions, among other actions. Based on the changes made, the Company consolidated the two separate reporting units within the Aerostar Division into one reporting unit for the purposes of goodwill impairment review. As such, as of April 30, 2016, the Company has three reporting units: Engineered Films Division, Applied Technology Division, and Aerostar Division. The Company reviewed the quantitative and qualitative factors associated with the change in reporting unit and determined there were no indicators of impairment at the time of the reporting unit change.

In the fiscal 2017 third quarter the Company determined that a triggering event occurred for its Aerostar reporting unit, which had $789 of goodwill as of October 31, 2016. The triggering event was caused by lowering the financial expectations for net sales and operating income of the reporting unit and certain asset groups due to delays and uncertainties regarding the reporting unit’s pursuit of certain opportunities, including aerostat orders, certain classified stratospheric balloon pursuits, and radar pursuits. Aerostar is still actively pursuing these opportunities and some are in active negotiations, but the timing of certain aerostat and classified stratospheric balloon opportunities are being delayed more than previously expected and the likelihood of radar sales is lower due to the Company's decision to no longer actively pursue certain radar product opportunities. The Step 1 impairment analysis was completed using fair value techniques as of October 31, 2016. In determining the estimated fair value of the Aerostar 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, 2016 analysis indicated that the estimated fair value of the Aerostar reporting unit exceeded the reporting unit carrying value by approximately $9,000, or approximately 30.0%.

As described in our Annual Report on Form 10-K/A for the fiscal year ended January 31, 2016, the Company determined that a triggering event occurred for its Vista reporting unit, a subsidiary of the Aerostar Division, during the fiscal 2016 third quarter. A Step 1 impairment analysis was completed using fair value techniques as of October 31, 2015 and it was determined that the estimated fair value of the Vista reporting unit was less than the carrying value.

Pursuant to the applicable accounting guidance, the Company performed a Step 2 impairment analysis. Based on this Step 2 impairment analysis the resulting implied fair value of the Vista goodwill was determined to have no value compared to the $11,497 carrying value recorded for the reporting unit. This $11,497 shortfall was recorded in the prior fiscal year third quarter as an impairment charge to operating income reported as "Goodwill impairment loss" in the Consolidated Statements of Income and Comprehensive Income.

The Company reported $11,497 in goodwill impairment losses for the three- and nine-month periods ended October 31, 2015. Goodwill gross and net of accumulated impairment losses at October 31, 2015 was $52,209 and $40,712, respectively. The Company's cumulative impairment loss recorded as of October 31, 2015 was $11,497.

The Company reported no impairment losses for the three- and nine-month periods ended October 31, 2016. Goodwill gross and net of accumulated impairment losses at October 31, 2016 was $52,200 and $40,703, respectively. The Company's cumulative impairment loss recorded as of October 31, 2016 was $11,497.

Long-Lived Asset Impairment Loss

Fiscal 2017 third quarter assessment

The Company evaluated the triggering events described in the goodwill impairment analysis and determined there were also triggering events with respect to the assets associated with the aerostat and stratospheric programs (Lighter than Air) and Radar asset groups in the Aerostar reporting unit in the third quarter, which resulted in an asset impairment test.

Using the sum of the undiscounted cash flows associated with each of the two asset groups, a Step 1 test was performed for each asset group. The undiscounted cash flows for the Lighter than Air asset group exceeded the carrying value of the long-lived assets by approximately $110,000, or 800%, and no Step 2 test was deemed to be necessary based on the recoverability of the long-lived assets. For the Radar asset group, however, the undiscounted cash flows did not exceed the carrying value of the long-lived assets and the Company performed a Step 2 impairment analysis for the long-lived assets.

In the Step 2 impairment analysis, the fair value determined was allocated to the assets and liabilities of the Radar asset group. The resulting estimated fair value of the Radar asset group long-lived assets was $175 compared to the carrying value of $262 for the asset group. The shortfall of $87 was recorded in the fiscal 2017 third quarter as an impairment charge to operating income reported as "Long-lived asset impairment loss" in the Consolidated Statements of Income and Comprehensive Income. The total impairment loss related to property, plant, and equipment and patents was $62 and $25, respectively.

Fiscal 2016 third quarter assessment

As described in our Annual Report on Form 10-K/A for the fiscal year ended January 31, 2016, the Company determined that the relevant cash flows for long-lived asset testing (the lowest level of cash flows that are largely independent of other assets) are one level below the Vista reporting unit. For Vista, these levels were determined to be asset groups identified for the client private business (CP) and Radar. Based on the assessment of the forecasts of cash flows and these asset groups, the Company concluded that certain long-lived assets of the Vista reporting unit, including finite-lived intangible assets, were impaired as of October 31, 2015.

Using the sum of the undiscounted cash flows associated with each of the two asset groups, a Step 1 test was performed for each asset group. The undiscounted cash flows for the CP asset group exceeded the carrying value of the long-lived assets and no Step 2 test was deemed to be necessary based on the recoverability of the long-lived assets. For the Radar asset group, however, the undiscounted cash flows did not exceed the carrying value of the long-lived assets, resulting in an estimated fair value of the Radar asset group long-lived assets of $103 compared to the carrying value of $3,916 for the asset group. The shortfall of $3,813 was recorded in fiscal 2016 third quarter as an impairment charge to operating income reported as "Long-lived asset impairment loss" in the Consolidated Statements of Income and Comprehensive Income. Of the total long-lived asset impairment of $3,813, $3,154 was related to amortizable intangible assets related to radar technology and radar customers, $554 was related to property, plant, and equipment, and $105 was related to patents.