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Valuation and Qualifying Accounts and Reserves (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Allowance for uncollectible accounts [Member]      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at Beginning of Year $ 7,402 $ 109,710 $ 88,814
Charged to Expense 1,051 25,605 21,448
Deductions 3,733 127,913 552
Balance at End of Year 4,720 7,402 109,710
Valuation allowance for deferred tax assets [Member]      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at Beginning of Year 32,481 28,413 29,846
Charged to Expense 0 4,068 0
Deductions 721 0 1,433
Balance at End of Year $ 31,760 $ 32,481 $ 28,413