Fair Value Measurements - Summary of Asset and Liability Fair Values (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Assets:
Equity securities	$ 258	$ 5,718
Key employee life insurance, cash surrender value	3,504	4,507
Total assets	93,392	82,946
Liabilities:
Deferred executive compensation liability	7,434	11,243
Total liabilities	7,434	11,243
Money market funds
Assets:
Available-for-sale	40,913	66,322
Government-related debt securities
Assets:
Available-for-sale	45,158
Mutual funds
Assets:
Available-for-sale	3,559	6,399
Level 1
Assets:
Equity securities	258	5,718
Key employee life insurance, cash surrender value	0	0
Total assets	89,880	78,430
Liabilities:
Deferred executive compensation liability	0	0
Total liabilities	0	0
Level 1 | Money market funds
Assets:
Available-for-sale	40,913	66,322
Level 1 | Government-related debt securities
Assets:
Available-for-sale	45,158
Level 1 | Mutual funds
Assets:
Available-for-sale	3,551	6,390
Level 2
Assets:
Equity securities	0	0
Key employee life insurance, cash surrender value	3,504	4,507
Total assets	3,512	4,516
Liabilities:
Deferred executive compensation liability	7,434	11,243
Total liabilities	7,434	11,243
Deferred executive compensation in accounts payable and other accrued liabilities	3,800	2,000
Deferred executive compensation in other long-term liabilities	3,600	9,200
Level 2 | Money market funds
Assets:
Available-for-sale	0	0
Level 2 | Government-related debt securities
Assets:
Available-for-sale	0
Level 2 | Mutual funds
Assets:
Available-for-sale	8	9
Level 3
Assets:
Equity securities	0	0
Key employee life insurance, cash surrender value	0	0
Total assets	0	0
Liabilities:
Deferred executive compensation liability	0	0
Total liabilities	0	0
Level 3 | Money market funds
Assets:
Available-for-sale	0	0
Level 3 | Government-related debt securities
Assets:
Available-for-sale	0
Level 3 | Mutual funds
Assets:
Available-for-sale	$ 0	$ 0