Employee Benefit Plans - Narrative (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) quarter year hour	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
401(k) and Profit Sharing Plan
401(k) and Profit Sharing Plans
Minimum age required to be considered eligible for plan | year	18
Period of employment required to be eligible for plan	3 months
Minimum number of quarters required to be eligible for employer discretionary contribution | quarter	1
Minimum number of hours required to be considered eligible for employer discretionary contribution | hour	501
Percent rate for non-elective safe harbor contribution as component of profit sharing plan	3.00%
Cost of plan	$ 20,421	$ 22,047	$ 17,227
Age of employee | year	50
Percentage of amount out of first specific percent of employee's contribution matched under plan	50.00%
Percentage of employee's contribution required to determine the matched amount under the plan	6.00%
Company's contribution to the plan	$ 5,267	4,985	4,236
401(k) and Profit Sharing Plan | Age Under 50
401(k) and Profit Sharing Plans
Maximum percentage of annual compensation allowable for contribution by eligible employees	60.00%
401(k) and Profit Sharing Plan | Age 50 and Over
401(k) and Profit Sharing Plans
Maximum percentage of annual compensation allowable for contribution by eligible employees	100.00%
Deferred Compensation Plan
401(k) and Profit Sharing Plans
Cost of plan	$ 470	504	480
Percentage of salary for deferral of cash payments	50.00%
Percentage of bonuses and directors fees for deferral of cash payments	100.00%
Liability related to obligations of deferred compensation plans	$ 8,861	9,276
Total amount deferred	$ 1,137	1,109	766
Credit earning rate as a percentage of return on equity	50.00%
Deferred Compensation Plan Acquired
401(k) and Profit Sharing Plans
Cost of plan	$ 1,094	971	992
Liability related to obligations of deferred compensation plans	18,560	17,321
Supplemental Employee Retirement Plan
401(k) and Profit Sharing Plans
Cost of plan	164	199	120
Company's contribution to the plan	858	910	$ 662
Liability related to obligations of deferred compensation plans	$ 3,974	$ 3,375
Credit earning rate as a percentage of return on equity	50.00%