Valuation and Qualifying Accounts and Reserves (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Allowance for uncollectible accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	$ 4,720	$ 7,402	$ 109,710
Charged to Expense	257	1,051	25,605
Deductions	1,491	3,733	127,913
Balance at End of Year	3,486	4,720	7,402
Valuation allowance for deferred tax assets [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	31,760	32,481	28,413
Charged to Expense	5,833	0	4,068
Deductions	0	721	0
Balance at End of Year	$ 37,593	$ 31,760	$ 32,481