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LONG-TERM DEBT - Senior Unsecured Debt (Details) - USD ($)
3 Months Ended 6 Months Ended
Jul. 20, 2020
Jun. 30, 2021
Mar. 31, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Nov. 17, 2017
Debt Instrument [Line Items]              
Amortization of prepayment premium   $ 242,000   $ 849,000 $ 1,090,000 $ 1,698,000  
Term B-2 Loan, due November 17, 2024              
Debt Instrument [Line Items]              
Wrote off of deferred debt issuance cost     $ 1,300,000        
Unsecured Debt | 7.25% senior unsecured notes, due November 1, 2024              
Debt Instrument [Line Items]              
Debt instrument, stated percentage (percent)   7.25%     7.25%   7.25%
Debt instrument, face amount   $ 400,000,000.0     $ 400,000,000.0   $ 400,000,000.0
Amortization of prepayment premium     14,500,000        
Write-off of unamortized premium     8,700,000        
Wrote off of deferred debt issuance cost     $ 1,000,000.0        
Line of Credit | New Revolver              
Debt Instrument [Line Items]              
Minimum liquidity covenant $ 75,000,000.0            
Letter of credit fee (percent) 2.50%            
Limitation on investments in joint ventures $ 75,000,000.0            
Line of Credit | New Revolver | Eurodollar              
Debt Instrument [Line Items]              
Spread on variable rate (percent) 2.50%            
Line of Credit | New Revolver | Base Rate              
Debt Instrument [Line Items]              
Spread on variable rate (percent) 1.50%