Employee Benefit Plans - Status of Supplemental Executive Retirement Plan (Parenthetical) (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Defined Benefit Plan Disclosure [Line Items]
Other long-term liabilities	$ 61,170	$ 64,245
Other accrued liabilities	236,982	$ 218,507
Supplemental Employee Retirement Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Other long-term liabilities	11,000
Other accrued liabilities	$ 300