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DEBT - Additional Information (Detail) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Oct. 11, 2023
Apr. 20, 2018
Oct. 31, 2017
Sep. 30, 2025
Sep. 30, 2024
Mar. 31, 2024
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Apr. 30, 2021
Debt Instrument [Line Items]                    
Offer price for senior notes, percentage             101.00%      
Total debt       $ 1,053,364     $ 1,053,364   $ 997,380  
Debt Instrument outstanding balance       1,053,364     1,053,364   997,380  
Expenses associated with debt repayments and refinancing transactions       0 $ 0   0 $ 31,316    
Term Loan [Member]                    
Debt Instrument [Line Items]                    
Total debt       114,100     114,100      
Non-Recourse Senior Secured Notes | Private Placement                    
Debt Instrument [Line Items]                    
Debt Instrument outstanding balance       135,800     135,800      
Debt maturity date   Jan. 31, 2040                
Stated interest rate   4.43%                
Aggregate principal amount   $ 159,500                
Scheduled maturity term   20 months                
Expected project completion period   January 2020                
Senior Notes Eight Point Two Five Percent Due Twenty Twenty Nine [Member]                    
Debt Instrument [Line Items]                    
Debt Instrument outstanding balance       $ 500,000     $ 500,000   500,000  
Debt maturity date           Apr. 15, 2029 Apr. 30, 2029      
Stated interest rate       8.25%     8.25%      
Aggregate principal amount           $ 500,000        
Senior Notes Eight Point Two Five Percent Due Twenty Twenty Nine [Member] | Redemption Beginning on April 15, 2026                    
Debt Instrument [Line Items]                    
Debt instrument redemption percentage of par             104.125%      
Debt instrument redemption beginning period             Apr. 15, 2026      
Senior Notes Eight Point Two Five Percent Due Twenty Twenty Nine [Member] | Redemption Beginning on April 15, 2028                    
Debt Instrument [Line Items]                    
Debt instrument redemption percentage of par             100.00%      
Debt instrument redemption beginning period             Apr. 15, 2028      
Senior Notes Eight Point Two Five Percent Due Twenty Twenty Nine [Member] | Redemption Beginning on April 15, 2027                    
Debt Instrument [Line Items]                    
Debt instrument redemption percentage of par             102.063%      
Debt instrument redemption beginning period             Apr. 15, 2027      
Bank Credit Agreement [Member] | Term Loan [Member]                    
Debt Instrument [Line Items]                    
Initial Balance $ 125,000                  
Senior Notes 4.75% Due 2027                    
Debt Instrument [Line Items]                    
Debt Instrument outstanding balance       $ 238,468     $ 238,468   $ 238,468  
Debt maturity date     Oct. 15, 2027       Oct. 31, 2027      
Stated interest rate     4.75% 4.75%     4.75%   4.75%  
Aggregate principal amount     $ 250,000              
Debt instrument redemption percentage of par     100.00%              
Debt instrument repurchase amount                 $ 11,500  
Senior Notes 8.25% Due 2026                    
Debt Instrument [Line Items]                    
Debt Instrument outstanding balance                 593,100  
Stated interest rate           8.25%       8.25%
Charges associated with the tender offer and redemption                 $ 31,300  
Bank Credit Facility [Member]                    
Debt Instrument [Line Items]                    
Line of credit facility, maximum borrowing capacity $ 275,000                  
Debt maturity period Oct. 31, 2028                  
Bank credit facility aggregate principal amount of additional borrowing $ 200,000                  
Bank credit facility, Consolidated EBITDA 50.00%                  
Bank Credit Facility Aggregate Principal Amount $ 400,000                  
Percentage of commitment fee to unfunded balance             0.35%      
Percentage of capital stock of foreign subsidiary secured by pledge under Bank Credit Facility 65.00%                  
Percentage of loan to value 50.00%                  
Bank Credit Facility [Member] | Maximum                    
Debt Instrument [Line Items]                    
Total leverage ratio 0.045                  
Secured leverage ratio 0.025                  
Fixed charge coverage ratio 0.0175                  
Consolidated total leverage ratio 0.0425                  
Bank Credit Facility [Member] | Base Rate                    
Debt Instrument [Line Items]                    
Debt instrument, percentage points added to reference rate             1.75%      
Bank Credit Facility [Member] | Base Rate | Minimum                    
Debt Instrument [Line Items]                    
Debt instrument, percentage points added to reference rate 1.75%                  
Bank Credit Facility [Member] | Base Rate | Maximum                    
Debt Instrument [Line Items]                    
Debt instrument, percentage points added to reference rate 3.50%                  
Bank Credit Facility [Member] | Secured Overnight Financing Rate                    
Debt Instrument [Line Items]                    
Debt instrument, percentage points added to reference rate             2.75%      
Bank Credit Facility [Member] | Secured Overnight Financing Rate | Minimum                    
Debt Instrument [Line Items]                    
Debt instrument, percentage points added to reference rate 2.75%                  
Bank Credit Facility [Member] | Secured Overnight Financing Rate | Maximum                    
Debt Instrument [Line Items]                    
Debt instrument, percentage points added to reference rate 4.50%                  
Revolving Credit Facility                    
Debt Instrument [Line Items]                    
Sublimit swing line loans $ 25,000                  
Line of credit facility, remaining borrowing capacity       $ 191,400     $ 191,400      
Sublimit for issuance of standby letters of credit       100,000     100,000      
Borrowings outstanding under credit facility       65,000     65,000      
Revolving Credit Facility letters of credit outstanding       $ 18,600     $ 18,600