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Pension Plan - Schedule of Plan's Weighted Average Asset Allocations (Detail)
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Dec. 31, 2013
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Dec. 31, 2012
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|---|---|---|
| Defined Benefit Plan Disclosure [Line Items] | ||
| Total | 100.00% | 100.00% |
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Cash and Cash Equivalents [Member]
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| Defined Benefit Plan Disclosure [Line Items] | ||
| Total | 3.00% | 6.00% |
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Equity Securities [Member]
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| Defined Benefit Plan Disclosure [Line Items] | ||
| Total | 66.00% | 63.00% |
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Fixed Income Securities [Member]
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| Defined Benefit Plan Disclosure [Line Items] | ||
| Total | 30.00% | 31.00% |
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Alternative Investments [Member]
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| Defined Benefit Plan Disclosure [Line Items] | ||
| Total | 1.00% | 0.00% |