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Summary of Significant Accounting Policies - Accounting Standards Recently Adopted (Details) - USD ($) $ in Thousands | Feb. 28, 2019 | Mar. 01, 2018 | Feb. 28, 2018
--- | --- | --- | ---
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Operating lease, right-of-use asset | $ 45,870 |  | $ 0
Operating lease, liability | $ 46,847 |  |
Accounting Standards Update 2016-02 [Member] |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Operating lease, right-of-use asset |  | $ 42,100 |
Operating lease, liability |  | $ 42,800 |

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- Definition Present value of lessee's discounted obligation for lease payments from operating lease. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977 + Details
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