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Contingent Liabilities - Additional Information (Detail) $ in Millions | Dec. 31, 2015 USD ($)
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Standby Letters of Credit [Member] |
Line of Credit Facility [Line Items] |
Loss contingency, range of possible loss, portion not accrued | $ 8.2
Bank Guaranties [Member] |
Line of Credit Facility [Line Items] |
Loss contingency, range of possible loss, portion not accrued | 3.0
Surety Bonds [Member] |
Line of Credit Facility [Line Items] |
Loss contingency, range of possible loss, portion not accrued | $ 2.4

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