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Pension Plans - Additional Information (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]      
Net settlement loss $ 1,700 $ 2,400  
Minimum time period for expected rate of return 10 years    
Maximum time period for expected rate of return 20 years    
Accrued cost related to pension plans included in other long term liabilities $ 34,800 36,900  
Change in equity as a result of change in deferred net loss 3,800 100 $ (16,100)
Change in equity as result of change in deferred net loss taxes $ 0 (100) $ 2,600
Pension Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Rate of qualified earnings credited to the account of the participant of benefit plan 3.00%    
Retirement age benefit payable to a terminated vested participant upon retirement 65 years    
Retirement age for benefit payments, earliest age allowed contingent of minimum service requirement 55 years    
Number of years of service at the time plan was frozen for the eligibility of benefit payable to terminated vested participant at age 55 15 years    
Net settlement loss $ 1,715 2,356  
Expected contribution to defined benefit plan 0    
Net gain recognized in other comprehensive income 3,800 200  
Unrecognized actuarial losses included in other comprehensive loss, net of tax 27,900 31,700  
Unrecognized actuarial losses included in other comprehensive loss 40,400 $ 44,200  
Defined benefit plan amounts that will be amortized from accumulated other comprehensive income loss in next fiscal year 1,100    
Non Qualified Pension Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Accumulated benefit obligation for defined benefit plan $ 14,900