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LONG-TERM DEBT (Details 2) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Dec. 31, 2019
Sep. 30, 2019
Dec. 31, 2019
Dec. 31, 2018
May 03, 2021
Mar. 31, 2020
Jun. 30, 2019
Mar. 31, 2019
Long-term debt                
Payments of Financing Costs     $ 17,545 $ 1,941        
Debt Instrument, Redemption Price, Percentage - Change of Control 101.00%              
Outstanding borrowing amount $ 1,408,688   1,408,688         $ 1,488,821
Senior Notes Due 2025 [Member]                
Long-term debt                
Outstanding borrowing amount $ 500,000   $ 500,000         500,000
Debt Instrument, Interest Rate, Stated Percentage 7.75%   7.75%          
Revolving credit facility                
Long-term debt                
Line of Credit Facility, Maximum Borrowing Capacity Reduction $ 640,000   $ 640,000     $ 600,000    
Line of Credit Facility, Maximum Borrowing Capacity 700,000   700,000   $ 406,500      
Payments of Financing Costs   $ 6,944            
Outstanding borrowing amount 0   0         215,000
Letters of Credit Outstanding, Amount 22,338   22,338         30,773
Borrowing capacity under revolving credit facility after reductions for borrowings and letters of credit outstanding 581,329   581,329          
Asset-backed Securities [Member]                
Long-term debt                
Line of Credit Facility, Maximum Borrowing Capacity 75,000   75,000         125,000
Outstanding borrowing amount $ 75,000   $ 75,000         80,700
Program fee on the amount outstanding (as a percent) 0.13%              
Line of Credit Facility, Commitment Fee Percentage 0.50%              
Percentage of line of credit on which commitment fees are charged (as a percent) 100.00%              
Senior Notes Due 2024 [Member] [Member]                
Long-term debt                
Debt Instrument, Interest Rate, Effective Percentage 6.25%   6.25%          
Payments of Financing Costs     $ 9,300          
Debt Instrument, Redemption Price, Percentage 100.00%              
Debt Instrument, Redemption, Description 40.00%              
Debt Instrument, Redemption Price, Percentage - Equity Offering 106.25%              
Outstanding borrowing amount $ 525,000   $ 525,000         0
Debt Instrument, Interest Rate, Stated Percentage 6.25%   6.25%          
Capital Lease Obligations [Member]                
Long-term debt                
Outstanding borrowing amount $ 25,967   $ 25,967         31,292
Senior notes due 2021 [Member]                
Long-term debt                
Debt instrument principal amount             $ 375,000  
Outstanding borrowing amount $ 0   $ 0         $ 375,000
Debt Instrument, Interest Rate, Stated Percentage             4.875%  
Maximum [Member] | Revolving credit facility                
Long-term debt                
Commitment fees (as a percent) 0.50%