Description of the frequency of periodic payments (monthly, quarterly, annual).

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Date when the debt instrument is scheduled to be fully repaid, in YYYY-MM-DD format.

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End date of debt instrument redemption period, in YYYY-MM-DD format.

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Weighted average interest rate of debt outstanding.

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Date the credit facility terminates, in YYYY-MM-DD format.

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The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

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Schedule of Debt Outstanding (Parenthetical) (Detail) - USD ($) $ in Thousands			1 Months Ended		9 Months Ended
	Dec. 18, 2019	Apr. 17, 2018	Oct. 31, 2017	Apr. 30, 2013	Sep. 30, 2021	Sep. 29, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Unamortized debt issuance costs					$ 22,946		$ 12,766
Term Loan A Due in April 2023
Debt Instrument [Line Items]
Debt interest rate					1.60%		1.60%
Debt maturity date		Apr. 30, 2023			Apr. 30, 2023
Interest payable dates					Interest payable periodically at variable interest rates.
Unamortized debt issuance costs					$ 0		$ 100
Term Loan B Due in December 2024
Debt Instrument [Line Items]
Debt interest rate					5.50%		5.50%
Debt maturity date	Dec. 31, 2024				Dec. 31, 2024
Interest payable dates					Interest payable periodically at variable interest rates.
Unamortized debt issuance costs					$ 3,300		$ 4,100
Senior Notes 4.625% Due 2023
Debt Instrument [Line Items]
Stated interest rate				4.625%	4.625%
Debt maturity date				May 01, 2023	May 31, 2023
Unamortized debt issuance costs					$ 500		1,500
Senior Notes 5.0% Redeemed in April 2021
Debt Instrument [Line Items]
Stated interest rate					5.00%
Unamortized debt issuance costs							800
Debt redemption date					Apr. 30, 2021
Senior Notes 4.75% Due 2027
Debt Instrument [Line Items]
Stated interest rate			4.75%		4.75%
Debt maturity date			Oct. 15, 2027		Oct. 31, 2027
Unamortized debt issuance costs					$ 2,400		2,700
8.25% Senior Notes Due 2026
Debt Instrument [Line Items]
Stated interest rate					8.25%	8.25%
Debt maturity date					Apr. 30, 2026
Unamortized debt issuance costs					$ 13,700
4.5% Capital Commerce Center Non-Recourse Mortgage Note
Debt Instrument [Line Items]
Stated interest rate					4.50%
Unamortized debt issuance costs							300
Lansing Correctional Center Non Recourse Mortgage Note 4.43% Due 2040
Debt Instrument [Line Items]
Stated interest rate					4.43%
Debt maturity date					Jan. 31, 2040
Unamortized debt issuance costs					$ 3,000		3,100
4.5% SSA-Baltimore Non-Recourse Mortgage Note
Debt Instrument [Line Items]
Stated interest rate					4.50%
Unamortized debt issuance costs							$ 200
Revolving Credit Facility \| Revolving Credit Facility Due in April 2023
Debt Instrument [Line Items]
Revolving Credit Facility maturity date					Apr. 30, 2023
Weighted average rate							1.70%
Interest payable dates					Interest payable periodically at variable interest rates.