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Pension Benefits - Fair Value of Plan Assets (Parenthetical) (Detail)	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Growth oriented assets	70.00%
Defensive assets	30.00%

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- Definition

Defined benefit plan, mutual funds asset allocations percentage defensive assets.

+ References

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- Definition

Defined benefit plan, mutual funds asset allocations percentage growth oriented assets.

+ References

No definition available.

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