Employee Benefit Plans (Defined Benefit Pension Plans not Recognized as Component of Combined Net Period Benefit Cost) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	$ (71,920)	$ (75,038)
Deferred tax benefit	25,172	26,263
Amounts included in accumulated other comprehensive loss, net of tax	$ (46,748)	$ (48,775)