Annual report pursuant to Section 13 and 15(d)

Operations and Summary of Significant Accounting Policies - Property and Equipment (Details)

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Operations and Summary of Significant Accounting Policies - Property and Equipment (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Property, Plant and Equipment [Line Items]    
Total property and equipment $ 419,962 $ 380,519
Less accumulated depreciation and amortization 200,867 190,652
Property and equipment, net 219,095 189,867
Land    
Property, Plant and Equipment [Line Items]    
Total property and equipment 26,479 26,365
Buildings and improvements    
Property, Plant and Equipment [Line Items]    
Total property and equipment $ 67,269 65,923
Buildings and improvements | Minimum    
Property, Plant and Equipment [Line Items]    
Property and equipment, useful life 30 years  
Buildings and improvements | Maximum    
Property, Plant and Equipment [Line Items]    
Property and equipment, useful life 40 years  
Equipment    
Property, Plant and Equipment [Line Items]    
Total property and equipment $ 259,030 246,949
Equipment | Minimum    
Property, Plant and Equipment [Line Items]    
Property and equipment, useful life 3 years  
Equipment | Maximum    
Property, Plant and Equipment [Line Items]    
Property and equipment, useful life 10 years  
Leasehold improvements    
Property, Plant and Equipment [Line Items]    
Total property and equipment $ 13,780 13,747
Computer software    
Property, Plant and Equipment [Line Items]    
Property and equipment, useful life 5 years  
Total property and equipment $ 26,333 23,480
Construction in progress    
Property, Plant and Equipment [Line Items]    
Total property and equipment $ 27,071 $ 4,055