Quarterly report pursuant to Section 13 or 15(d)

LONG-TERM DEBT AND REDEEMABLE PREFERRED SHARES - Redeemable Preferred Shares (Details)

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LONG-TERM DEBT AND REDEEMABLE PREFERRED SHARES - Redeemable Preferred Shares (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 6 Months Ended 12 Months Ended
Nov. 09, 2021
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Dec. 31, 2022
Debt Instrument [Line Items]            
Dividend percentage 6.50%          
Preferred dividend, paid in cash percentage 40.00%          
Preferred dividend, paid in kind percentage 60.00%          
Period of dividend payment after annual meeting 3 days          
Preferred dividends paid in arrears       $ 6.5   $ 4.5
6.50% Redeemable Preferred Shares            
Debt Instrument [Line Items]            
Period following latest maturity date 6 months          
Period following issuance of 6.50% redeemable preferred shares 9 years          
Liquidation preference $ 100.0          
Redemption price   $ 106.5   106.5   $ 104.5
6.50% Redeemable Preferred Shares | Interest Expense            
Debt Instrument [Line Items]            
Dividends   $ 1.7 $ 1.6 $ 3.4 $ 3.3  
Mandatorily Redeemable Preferred Stock            
Debt Instrument [Line Items]            
Mandatory redeemable shares amount $ 100.0          
SK Holdings Ordinary Shares Exchange            
Debt Instrument [Line Items]            
Number of shares issued in conversion (in shares) 10,000,000          
Preferred stock conversion price (in usd per share) $ 10