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Stock Based Compensation - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended
Apr. 29, 2016
May 31, 2016
Mar. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Common stock reserved for issuance     18,000,000
Total compensation expense related to unvested stock-based awards granted to employees, officers and directors     $ 23,759
Restricted Stock Units (RSUs) [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares issued as per merger agreement     1,260,525
Number of RSUs outstanding     17,462
Dividend reinvestment     234
Restricted stock units, granted     171,179
Restricted stock units, weighted average grant date fair value     $ 66.06
Restricted Stock Units (RSUs) [Member] | Newport Deferred Compensation [Member] | Outside Directors [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Newport RSUs converted to MKS RSUs at Merger date     36,599
Newport RSUs converted to MKS RSUs at Merger date and released   19,137  
Stock Appreciation Rights (SARs) [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Restricted stock units, granted     0
Restricted stock units, weighted average grant date fair value     $ 0
Newport [Member] | Restricted Stock Units (RSUs) [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares issued as per merger agreement 360,674    
Newport [Member] | Stock Appreciation Rights (SARs) [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares issued as per merger agreement 899,851