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Salary Deferral Plans (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Deferred Compensation Arrangements [Abstract]      
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent 50.00%    
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay 4.00%    
Percentage of employee self-directed contributions matched by employer 100.00%    
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]      
Compensation expense $ 11,100 $ 9,400 $ 8,100
Other liabilities 377,343 411,074  
Supplemental Employee Retirement Plan      
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]      
Other liabilities 30,400 $ 29,800  
SERP covered by Rabbi Trust      
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]      
Other liabilities $ 17,200