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Coronavirus Pandemic ("COVID-19") - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Mar. 27, 2020
Line of credit remaining borrowing capacity	$ 446,000
Letters of Credit [Member]
Letters of credit	0
COVID-19 [Member]
Reimbursement of Lost Revenue				$ 100,000,000
Proceeds From Contribution In Aid Of Reimbursement of Lost Revenue	$ 13,300	$ 26,100	$ 22,000
COVID-19 [Member] | Rural Area [Member]
Reimbursement of Lost Revenue				$ 70,000,000
COVID-19 [Member] | Two Thousand Twenty Tax Year [Member]
Percentage Of Refund Of Income Tax At The Prior Period Corporate Tax Rate	35.00%
COVID-19 [Member] | Executive Officer [Member]
Decrease In Salary | %	50.00%

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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