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Background and Summary of Significant Accounting Policies (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2018
Sep. 29, 2018
[1]
Jun. 30, 2018
[1]
Mar. 31, 2018
[1]
Dec. 31, 2017
Sep. 30, 2017
[1]
Jul. 01, 2017
[1]
Apr. 01, 2017
[1]
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Jan. 01, 2019
Jan. 01, 2018
Summary of Significant Accounting Policies [Line Items]                          
Minimum ownership of fully controlled entities 100.00%               100.00%        
Research and development expense                 $ 11,800 $ 11,700 $ 11,100    
Recognized tax benefit to be realized upon ultimate settlement                 greater than 50 percent likely to be realized        
Tax Cuts And Jobs Act Of 2017, income tax benefit $ 800                 (2,200)      
Allowance for doubtful accounts 500       $ 600       $ 500 600      
Bad debt expense                 0 100 200    
Depreciation expense                 8,900 8,700 9,300    
Goodwill, impairment                 2,500        
Other (expense) income - net                 (3,234) (1,925) (1,660)    
Operating income (loss) $ 7,091 [1] $ 10,631 $ 11,315 $ 8,186 7,160 [1] $ 5,530 $ 5,853 $ 3,945 37,223 22,488 11,267    
Accounting Standards Update 2016-16                          
Summary of Significant Accounting Policies [Line Items]                          
Cumulative effect adjustment for adoption of ASU 2016-16         $ (153)         (153)      
Accounting Standards Update 2017-04                          
Summary of Significant Accounting Policies [Line Items]                          
Goodwill, impairment                 2,500        
Accounting Standards Update 2017-07                          
Summary of Significant Accounting Policies [Line Items]                          
Other (expense) income - net                 $ 1,700 900 600    
Operating income (loss)                   (900) (600)    
Minimum | Patents and acquired technology                          
Summary of Significant Accounting Policies [Line Items]                          
Finite-lived intangible assets, useful life (in years)                 7 years        
Minimum | Customer relationships                          
Summary of Significant Accounting Policies [Line Items]                          
Finite-lived intangible assets, useful life (in years)                 5 years        
Minimum | Trade names                          
Summary of Significant Accounting Policies [Line Items]                          
Finite-lived intangible assets, useful life (in years)                 7 years        
Minimum | Non-competition agreements                          
Summary of Significant Accounting Policies [Line Items]                          
Finite-lived intangible assets, useful life (in years)                 5 years        
Maximum | Patents and acquired technology                          
Summary of Significant Accounting Policies [Line Items]                          
Finite-lived intangible assets, useful life (in years)                 20 years        
Maximum | Customer relationships                          
Summary of Significant Accounting Policies [Line Items]                          
Finite-lived intangible assets, useful life (in years)                 15 years        
Maximum | Trade names                          
Summary of Significant Accounting Policies [Line Items]                          
Finite-lived intangible assets, useful life (in years)                 10 years        
Maximum | Non-competition agreements                          
Summary of Significant Accounting Policies [Line Items]                          
Finite-lived intangible assets, useful life (in years)                 10 years        
Machinery and Equipment | Minimum                          
Summary of Significant Accounting Policies [Line Items]                          
Property, plant and equipment, useful life (in years)                 7 years        
Machinery and Equipment | Maximum                          
Summary of Significant Accounting Policies [Line Items]                          
Property, plant and equipment, useful life (in years)                 10 years        
Building and Building Improvements | Minimum                          
Summary of Significant Accounting Policies [Line Items]                          
Property, plant and equipment, useful life (in years)                 20 years        
Building and Building Improvements | Maximum                          
Summary of Significant Accounting Policies [Line Items]                          
Property, plant and equipment, useful life (in years)                 40 years        
Software                          
Summary of Significant Accounting Policies [Line Items]                          
Depreciation expense                 $ 500 $ 500 $ 600    
Software | Minimum                          
Summary of Significant Accounting Policies [Line Items]                          
Property, plant and equipment, useful life (in years)                 3 years        
Software | Maximum                          
Summary of Significant Accounting Policies [Line Items]                          
Property, plant and equipment, useful life (in years)                 5 years        
Retained Earnings | Accounting Standards Update 2016-16                          
Summary of Significant Accounting Policies [Line Items]                          
Cumulative effect adjustment for adoption of ASU 2016-16                         $ 200
Subsequent Event | Minimum | Accounting Standards Update 2016-02                          
Summary of Significant Accounting Policies [Line Items]                          
Operating lease, right-of-use asset                       $ 10,500  
Operating lease, liability                       10,500  
Subsequent Event | Maximum | Accounting Standards Update 2016-02                          
Summary of Significant Accounting Policies [Line Items]                          
Operating lease, right-of-use asset                       11,500  
Operating lease, liability                       $ 11,500  
[1] The Company reports interim financial information for the 13-week periods beginning on a Sunday and ending on a Saturday, except for the first fiscal quarter, which always begins on January 1, and the fourth fiscal quarter, which always ends on December 31. The first, second, third, and fourth quarters of 2018 ended on March 31, June 30, September 29, and December 31, respectively. The first, second, third, and fourth quarters of 2017 ended on April 1, July 1, September 30, and December 31, respectively.