Indebtedness - New Senior Notes - Additional Information (Detail) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended
Jan. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Unamortized debt issuance costs		$ 37,569	$ 30,625
8.25% Senior Notes Due 2029
Debt Instrument [Line Items]
Aggregate principal amount	$ 600,000
Interest rate on notes	8.25%	8.25%	8.25%
Debt instrument maturity year	2029
Net proceeds after underwriting expenses	$ 590,800
Unamortized debt issuance costs	$ 9,200
Maximum redemption price of notes as percentage of principal amount		100.00%

Debt instrument maturity year.

No definition available.

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- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

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- Definition

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

+ References

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- Definition

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.

+ References

No definition available.

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- Definition

Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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- Definition

Amount, after accumulated amortization, of debt discount (premium).

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- Definition

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.

+ References

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