Basis of Presentation - Additional Information (Detail) - Joint Venture Transactions	Feb. 29, 2016
DHybrid Systems LLC
Significant Accounting Policies [Line Items]
Percent of controlling interest by the Company	79.59%
Spartan
Significant Accounting Policies [Line Items]
Percent of controlling interest by the Company	52.00%
TWB
Significant Accounting Policies [Line Items]
Percent of controlling interest by the Company	55.00%
Worthington Aritas
Significant Accounting Policies [Line Items]
Percent of controlling interest by the Company	75.00%
WEI
Significant Accounting Policies [Line Items]
Percent of controlling interest by the Company	75.00%