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Retirement Plans - Defined Contribution Plans - Additional Information (Detail) (Salaried and Quinnesec hourly employees defined contribution plan, USD $)
In Millions, unless otherwise specified |
12 Months Ended | ||
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Dec. 31, 2014
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Dec. 31, 2013
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Dec. 31, 2012
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Salaried and Quinnesec hourly employees defined contribution plan
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| Defined Contribution Plan [Line Items] | |||
| Defined contribution plan expense | $ 4.9 | $ 4.8 | $ 5.6 |