Lease Obligations - Additional Information (Detail) - USD ($) |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
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| Leases [Abstract] | |||
| Rental expense | $ 56,200,000 | $ 53,400,000 | $ 58,000,000 |
| Property, plant and equipment under capital leases | $ 0 | $ 0 | |
| X | ||||||||||
- Definition The total gross amount less the charge for the use of the long-lived depreciable assets subject to a lease meeting the criteria for capitalization. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line. No definition available.
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| X | ||||||||||
- References No definition available.
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