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Employee Benefit Plans Multiemployer Plan (Details) - USD ($) $ in Thousands | 12 Months Ended
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Feb. 28, 2019 | Feb. 28, 2018 | Feb. 28, 2017
Multiemployer Plans [Line Items] |  |  |
Multiemployer Plan, Contributions by Employer | $ 6,278 | $ 4,540 | $ 8,095
Boilermaker-Blacksmith National Pension Trust [Member] |  |  |
Multiemployer Plans [Line Items] |  |  |
Entity ID Number | EIN:48-6168020 Plan: 001 |  |
Zone Status | Endangered | Endangered |
Multiemployer Plans, Funding Improvement Plan and Rehabilitation Plan | Implemented |  |
Multiemployer Plan, Contributions by Employer | $ 5,651 | $ 4,070 | 7,359
Multiemployer Plans, Surcharge | No |  |
Multiemployer Plans, Collective-Bargaining Arrangement, Expiration Date | Various through 12/31/2019 |  |
Individually Insignificant Plans [Member] |  |  |
Multiemployer Plans [Line Items] |  |  |
Multiemployer Plan, Contributions by Employer | $ 627 | $ 470 | $ 736

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- Definition Amount of contributions made to multiemployer plan by employer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450702-114947 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 5 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450691-114947 + Details
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- Definition Indicate whether a funding improvement plan or rehabilitation plan has been implemented or is pending for a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers. The acceptable values are "no", "pending", "implemented", "other", and "NA". + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 5 -Subparagraph (f)(1) -URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947 + Details
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- Definition Indicate whether the employer paid a surcharge to the pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers. The acceptable values are "no", "yes", and "NA". + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 5 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947 + Details
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