Employer Sponsored Benefit Plan (Defined Benefit Pension Plan with an Accumulated Benefit Obligation In Excess of Plan Assets) (Detail) - Domestic Pension Plan - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	$ 48,081	$ 50,827
Accumulated benefit obligation	48,081	50,827
Fair value of plan assets	$ 35,413	$ 33,275