Employee Benefit Plans (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) Contribution	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Executive Retirement Plan, Life Insurance Arrangements and Senior Management Retention Plan [Abstract]
Net gains on deferred compensation plan investments	$ 2,625	$ 1,088	$ 2,563
Tax-exempt interest earned on the life insurance policies	2,031	1,900	1,822
Executive Officers [Member]
Executive Retirement Plan, Life Insurance Arrangements and Senior Management Retention Plan [Abstract]
Employer contribution	6,600	6,200	4,300
Total accrued liability	58,600	48,500
Net gains on deferred compensation plan investments	2,600	1,100
Tax-exempt interest earned on the life insurance policies	2,000	1,900	1,800
Cash surrender value of life insurance policies	67,100	65,100
Senior Level Employees [Member] | Senior Management Retention Plan [Member]
Executive Retirement Plan, Life Insurance Arrangements and Senior Management Retention Plan [Abstract]
Employer contribution	1,300	1,500	765
Total accrued liability	$ 8,100	5,700
Profit Sharing Plan [Member]
Profit Sharing Plan [Abstract]
us-gaap_PensionPlansDefinedBenefitMember	us-gaap:DefinedContributionPlanTypeExtensibleList
Minimum requisite service period	1 year
Number of annual employer contribution | Contribution	2
Employer discretionary contribution amount	$ 1,400	1,200	1,000
Employer mandatory contributions amount	$ 1,600	$ 1,400	$ 1,200
Annual vesting percentage, first year	0.00%
Annual vesting percentage, full year thereafter	25.00%
Benefit vesting period	5 years