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Goodwill (Tables)
12 Months Ended
Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Changes in Goodwill
The following table presents changes in goodwill in the accompanying Consolidated Balance Sheet (in thousands): 
December 31, 2020December 31, 2021
Goodwill at the beginning of year$398,292 $392,978 
Net increase in goodwill related to acquisitions14,054 — 
Decrease in goodwill related to divestitures(5,736)(1,006)
Decrease in goodwill related to impairments(13,632)— 
Goodwill at the end of the year$392,978 $391,972