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Employee Benefit Plans - Weighted Average Assumptions to Measure Benefit Obligation (Detail)
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12 Months Ended | |
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Dec. 31, 2013
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Dec. 31, 2012
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Defined Benefit Pension Plans [Member]
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| Pension Plans, Postretirement and Other Employee Benefits [Line Items] | ||
| Discount rate | 4.80% | 3.60% |
| Expected long-term return on plan assets | 7.00% | 7.20% |
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Post-Retirement Benefit Plans [Member]
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| Pension Plans, Postretirement and Other Employee Benefits [Line Items] | ||
| Discount rate | 5.30% | 3.80% |