Annual report pursuant to Section 13 and 15(d)

Income Tax - Reconciliation of Income Tax Attributable to Operations (Parenthetical) (Detail)

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Income Tax - Reconciliation of Income Tax Attributable to Operations (Parenthetical) (Detail)
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Income Tax Disclosure [Abstract]      
Income tax rate assumed for both State and Foreign deferred tax calculations 34.00% 34.00% 34.00%