Fair Value Measurements - Additional Information (Details) - USD ($)	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021
Schedule Of Available For Sale Securities [Line Items]
Available for sale securities continuous unrealized loss position twelve months or more amortized historical cost basis	$ 53,900,000
Available-for-sale Securities, Equity investment securities	206,000		$ 206,000
Change in market value common stock investment Ioss	28,000
Common Stocks by Industry [Member]
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities, Equity investment securities		$ 677,000,000
Level 2 [Member] | Equity Investment [Member]
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Securities, Equity investment securities	677,000,000
Corporate [Member]
Schedule Of Available For Sale Securities [Line Items]
Available for sale securities aggregate market value	616,000		$ 722,000
Corporate [Member] | Level 2 [Member]
Schedule Of Available For Sale Securities [Line Items]
Available for sale securities continuous unrealized loss position twelve months or more amortized historical cost basis	4,100,000
Available for sale securities aggregate market value	$ 4,800,000