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Financial Information for Reportable Segments (Detail) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 1 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Feb. 28, 2014
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Nov. 30, 2013
|
Aug. 31, 2013
|
Feb. 28, 2013
|
Feb. 28, 2014
|
Feb. 28, 2013
|
May 31, 2013
|
Feb. 28, 2014
Steel Processing
|
Feb. 28, 2013
Steel Processing
|
Feb. 28, 2014
Steel Processing
|
Feb. 28, 2013
Steel Processing
|
May 31, 2013
Steel Processing
|
Oct. 31, 2012
Pressure Cylinders
|
Feb. 28, 2014
Pressure Cylinders
|
Aug. 31, 2013
Pressure Cylinders
|
Feb. 28, 2013
Pressure Cylinders
|
Feb. 28, 2014
Pressure Cylinders
|
Feb. 28, 2013
Pressure Cylinders
|
May 31, 2013
Pressure Cylinders
|
Feb. 28, 2014
Engineered Cabs
|
Feb. 28, 2013
Engineered Cabs
|
Feb. 28, 2014
Engineered Cabs
|
Feb. 28, 2013
Engineered Cabs
|
May 31, 2013
Engineered Cabs
|
Feb. 28, 2014
Other
|
Feb. 28, 2013
Other
|
Feb. 28, 2014
Other
|
Feb. 28, 2013
Other
|
May 31, 2013
Other
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| Segment Reporting Information [Line Items] | |||||||||||||||||||||||||||||
| Net sales | $ 773,230 | $ 619,527 | $ 2,235,421 | $ 1,908,184 | $ 477,983 | $ 353,879 | $ 1,372,558 | $ 1,082,998 | $ 233,290 | $ 205,206 | $ 664,212 | $ 606,936 | $ 51,485 | $ 48,628 | $ 147,814 | $ 170,927 | $ 10,472 | $ 11,814 | $ 50,837 | $ 47,323 | |||||||||
| Operating income (loss) | 45,289 | 33,406 | 103,426 | 95,646 | 28,264 | 17,701 | 85,713 | 48,166 | 21,278 | 17,860 | 49,007 | 49,965 | (1,088) | 108 | (22,284) | 5,367 | (3,165) | (2,263) | (9,010) | (7,852) | |||||||||
| Restructuring and other expense (income) | 1,398 | 146 | (3,781) | 1,811 | 1,380 | (3,382) | 412 | 177 | (1,035) | 183 | (394) | (31) | 636 | 1,628 | |||||||||||||||
| Impairment of long-lived assets | 30,734 | 4,641 | 35,375 | 1,520 | 4,641 | 1,520 | 1,570 | 11,634 | 1,520 | 19,100 | |||||||||||||||||||
| Joint venture transactions | 120 | 253 | 1,048 | (1,188) | 120 | 253 | 1,048 | (1,188) | |||||||||||||||||||||
| Total assets | $ 2,125,907 | $ 2,125,907 | $ 1,950,857 | $ 856,119 | $ 856,119 | $ 610,464 | $ 780,191 | $ 780,191 | $ 742,686 | $ 176,620 | $ 176,620 | $ 201,048 | $ 312,977 | $ 312,977 | $ 396,659 | ||||||||||||||