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Note 12 - Senior Notes and Credit Facilities (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Apr. 30, 2022
Jan. 31, 2022
Apr. 30, 2021
Apr. 30, 2022
Apr. 30, 2021
Oct. 31, 2021
Debt Covenant Fixed Charge Coverage Ratio Minimum 2.0     2.0    
Secured Debt Leverage Ratio 4.0     4.0    
Dividends Payable $ 2,700     $ 2,700    
Dividends, Preferred Stock, Total 2,669 $ 2,669        
Gain (Loss) on Extinguishment of Debt, Total (6,795)   $ 0 (6,795) $ 0  
Senior Secured Revolving Credit Facility [Member]            
Line of Credit Facility, Maximum Borrowing Capacity 125,000     125,000    
Stand-alone Cash Collateralized Letter of Credit Agreements and Facilities [Member]            
Letters of Credit Outstanding, Amount 7,600     7,600   $ 9,300
Stand-alone Cash Collateralized Letter of Credit Agreements and Facilities [Member] | Restricted Cash [Member]            
Debt Instrument, Collateral Amount 7,800     7,800   $ 9,900
The Secured Credit Facility, the New Secured Notes, and the Second Lien Notes [Member] | Cash and Cash Equivalents Collateral [Member]            
Debt Instrument, Collateral Amount 152,700     152,700    
The Secured Credit Facility, the New Secured Notes, and the Second Lien Notes [Member] | Restricted Cash [Member]            
Debt Instrument, Collateral Amount 7,800     7,800    
The Secured Credit Facility, the New Secured Notes, and the Second Lien Notes [Member] | Real Property [Member]            
Debt Instrument, Collateral Amount 394,300     394,300    
The Secured Credit Facility, the New Secured Notes, and the Second Lien Notes [Member] | Equity Interests in Joint Venture Holding Companies Collateral [Member]            
Debt Instrument, Collateral Amount 100,100     100,100    
The 8.0% Senior Notes Due 2027 [Member] | Unsecured Senior Notes Excluding Senior Amortizing Notes and Senior Exchangeable Notes [Member]            
Debt Instrument, Face Amount $ 26,000     $ 26,000    
Debt Instrument, Interest Rate, Stated Percentage [1] 8.00%     8.00%   8.00%
The 7.75% 2026 Notes [Member] | Senior Secured Notes [Member]            
Debt Instrument, Interest Rate, Stated Percentage 7.75%     7.75%    
Debt Instrument, Redeemed, Face Amount $ 100,000     $ 100,000    
Repayments of Secured Debt 105,500          
Gain (Loss) on Extinguishment of Debt, Total $ (6,800)     $ (6,800)    
The 7.75% Senior Secured 1.125 Lien Notes due February 15, 2026 [Member] | Senior Secured Notes [Member]            
Debt Instrument, Interest Rate, Stated Percentage 7.75%     7.75%   7.75%
The 7.75% Senior Secured 1.125 Lien Notes due February 15, 2026 [Member] | Senior Secured Notes [Member] | Debt Instrument, Redemption, Period Two [Member] | Redemption with Net Cash Proceeds from Certain Equity Offerings [Member]            
Debt Instrument, Redemption Price, Percentage 103.875%          
The 7.75% Senior Secured 1.125 Lien Notes due February 15, 2026 [Member] | Senior Secured Notes [Member] | Debt Instrument, Redemption, Period Three [Member] | Redemption with Net Cash Proceeds from Certain Equity Offerings [Member]            
Debt Instrument, Redemption Price, Percentage 101.937%          
The 7.75% Senior Secured 1.125 Lien Notes due February 15, 2026 [Member] | Senior Secured Notes [Member] | Debt Instrument, Redemption, Period Four [Member] | Redemption with Net Cash Proceeds from Certain Equity Offerings [Member]            
Debt Instrument, Redemption Price, Percentage 100.00%          
The 10.5% Senior Secured 1.25 Lien Notes due February 15, 2026 [Member] | Senior Secured Notes [Member]            
Debt Instrument, Interest Rate, Stated Percentage 10.50%     10.50%   10.50%
The 10.5% Senior Secured 1.25 Lien Notes due February 15, 2026 [Member] | Senior Secured Notes [Member] | Debt Instrument, Redemption, Period Two [Member] | Redemption with Net Cash Proceeds from Certain Equity Offerings [Member]            
Debt Instrument, Redemption Price, Percentage 105.25%          
The 10.5% Senior Secured 1.25 Lien Notes due February 15, 2026 [Member] | Senior Secured Notes [Member] | Debt Instrument, Redemption, Period Three [Member] | Redemption with Net Cash Proceeds from Certain Equity Offerings [Member]            
Debt Instrument, Redemption Price, Percentage 102.625%          
The 10.5% Senior Secured 1.25 Lien Notes due February 15, 2026 [Member] | Senior Secured Notes [Member] | Debt Instrument, Redemption, Period Four [Member] | Redemption with Net Cash Proceeds from Certain Equity Offerings [Member]            
Debt Instrument, Redemption Price, Percentage 100.00%          
The 11.25% Senior Secured 1.5 Lien Notes due February 15, 2026 [Member] | Senior Secured Notes [Member]            
Debt Instrument, Interest Rate, Stated Percentage 11.25%     11.25%   11.25%
Debt Instrument, Redemption Price, Percentage 100.00%          
The 10.0% Senior Secured 1.75 Lien Notes due 2025 [Member] | Debt Instrument, Redemption, Period Two [Member]            
Debt Instrument, Redemption Price, Percentage 102.50%          
The 10.0% Senior Secured 1.75 Lien Notes due 2025 [Member] | Debt Instrument, Redemption, Period Three [Member]            
Debt Instrument, Redemption Price, Percentage 100.00%          
The 10.0% Senior Secured 1.75 Lien Notes due 2025 [Member] | Debt Instrument, Redemption, Period Four [Member]            
Debt Instrument, Redemption Price, Percentage 105.00%          
The 10.0% Senior Secured 1.75 Lien Notes due 2025 [Member] | Debt Instrument, Redemption, Period One [Member]            
Debt Instrument, Redemption Price, Percentage 105.00%          
The 10.0% Senior Secured 1.75 Lien Notes due 2025 [Member] | Debt Instrument, Redemption, Period Five [Member]            
Debt Instrument, Redemption Price, Percentage 102.50%          
The 10.0% Senior Secured 1.75 Lien Notes due 2025 [Member] | Debt Instrument, Redemption, Period Six [Member]            
Debt Instrument, Redemption Price, Percentage 100.00%          
The 10.0% Senior Secured 1.75 Lien Notes due 2025 [Member] | Senior Secured Notes [Member]            
Debt Instrument, Interest Rate, Stated Percentage 10.00%     10.00%   10.00%
The 13.5% Senior Notes Due 2026 [Member] | Unsecured Senior Notes Excluding Senior Amortizing Notes and Senior Exchangeable Notes [Member]            
Debt Instrument, Interest Rate, Stated Percentage 13.50%     13.50%   13.50%
The 13.5% Senior Notes Due 2026 [Member] | Unsecured Senior Notes [Member] | Debt Instrument, Redemption, Period Two [Member]            
Debt Instrument, Redemption Price, Percentage 100.00%          
The 13.5% Senior Notes Due 2026 [Member] | Unsecured Senior Notes [Member] | Debt Instrument, Redemption, Period One [Member]            
Debt Instrument, Redemption Price, Percentage 100.00%          
The 5.0% Senior Notes due 2040 [Member] | Unsecured Senior Notes Excluding Senior Amortizing Notes and Senior Exchangeable Notes [Member]            
Debt Instrument, Interest Rate, Stated Percentage 5.00%     5.00%   5.00%
The 5.0% Senior Notes due 2040 [Member] | Unsecured Senior Notes [Member] | Debt Instrument, Redemption, Period One [Member]            
Debt Instrument, Redemption Price, Percentage 100.00%          
[1] $26.0 million of 8.0% Senior Notes due 2027 (the "8.0% 2027 Notes") are owned by a wholly-owned consolidated subsidiary of HEI. Therefore, in accordance with GAAP, such notes are not reflected on the Condensed Consolidated Balance Sheets of HEI.