XML 35 R77.htm IDEA: XBRL DOCUMENT v2.4.1.9
Assumptions Used to Determine Actuarial Present Value of Projected Benefit Obligation and Net Periodic Pension Benefit Cost (Detail)
12 Months Ended
Dec. 31, 2014
Schedule of Benefit Obligations Weighted Average Assumptions [Line Items]  
Discount rate 2.19%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate
Expected long-term rate of return on plan assets 2.43%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets