Annual report pursuant to Section 13 and 15(d)

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

v2.4.1.9
Income Tax - Reconciliation of Income Tax Attributable to Operations (Parenthetical) (Detail)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Income Tax Disclosure [Abstract]        
Income tax rate assumed for both State and Foreign deferred tax calculations 34.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate 34.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate 34.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate 34.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate