Valuation and Qualifying Accounts (Detail) - USD ($)		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Allowance for Uncollectible Trade Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year		$ 20,061,000	$ 8,280,000	$ 6,910,000
Charged to Costs & Expenses		2,985,000	308,000	135,000
Charged to Other Accounts	[1]	15,557,000	11,510,000	1,242,000
Deductions	[2]	(23,000)	(37,000)	(7,000)
Balance at End of Year		38,580,000	20,061,000	8,280,000
Deferred tax valuation allowance [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year		5,023,000	6,518,000	4,713,000
Charged to Costs & Expenses		3,456,000	1,495,000	1,805,000
Balance at End of Year		$ 1,567,000	$ 5,023,000	$ 6,518,000

[1] Expected customer account adjustments charged to revenue and write-offs, net of recoveries.

[2] Represents bad debt recoveries.