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Derivative Instruments and Hedging Activities - Additional Information (Detail) (Interest Rate Swaps And Cross Currency Swaps Agreement [Member], USD $) In Millions, unless otherwise specified | Dec. 31, 2013
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Interest Rate Swaps And Cross Currency Swaps Agreement [Member] |
Derivative [Line Items] |
Fair value asset amount of interest rate swaps and cross currency swaps | $ 85.2
Fair value liability amount of interest rate swaps and cross currency swaps | $ 361.1

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