XML 110 R90.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Retirement Plans - Additional Information (Detail) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]        
Company contributions to defined contribution plans   amortize cumulative actuarial gains and losses in excess of 10% of the larger of the market-related value of plan assets and the projected benefit obligation over the expected future service of active participants.    
Company contributions made to other non U S post-retirement plans   $ 15,000 $ 13,000 $ 12,000
Effect of one-quarter percentage point increase in discount rate on net periodic benefit cost   less than $1 million    
Effect of one-quarter percentage point increase in return on assets on net periodic benefit cost   less than $1 million    
Projected benefit obligation $ 60,359 $ 81,566 60,359  
Accumulated benefit obligations 56,029 73,644 56,029  
Fair value of plan assets 44,940 60,832 44,940  
Belgium [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Projected benefit obligation   11,000    
Accumulated benefit obligations   6,000    
Fair value of plan assets   10,000    
Waters Retirement Plan [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Defined benefit plan, settlement charge, cash contribution 6,000 6,000    
Defined benefit plan, settlement charge 46,000 46,000    
Defined benefit plan, settlement charge, non-cash $ 40,000 $ 40,000    
Defined benefit plan, settlement charge, net income per diluted share   0.39    
U S Retiree Healthcare Plan [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Defined benefit plan diversification   investments are diversified among market capitalization and investment strategy, and targets a 45% allocation of the equity portfolio to be invested in financial markets outside of the United States.    
U S Defined Contribution Plan [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Employee 401(k) contributions as % of salary, upper range limit   60.00%    
Company 401(k) matching contribution rate as % of employee contribution   100.00%    
Company 401(k) matching contribution limit as % of salary   6.00%    
Annual vesting percentage on employee 401(k) contributions   100.00%    
Company contributions to defined contribution plans   $ 17,000 $ 17,000 $ 16,000
Minimum [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Estimated future employer contributions in current fiscal year   3,000    
Maximum [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Estimated future employer contributions in current fiscal year   $ 6,000