Long-Term Debt - Additional Information (Details)
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3 Months Ended |
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Apr. 26, 2019
USD ($)
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Mar. 15, 2019
USD ($)
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May 04, 2018 |
Nov. 30, 2017
USD ($)
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Mar. 31, 2019
USD ($)
redetermination
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Dec. 31, 2018
USD ($)
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Nov. 02, 2018
USD ($)
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| Senior Notes |
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| Debt Instrument [Line Items] |
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| Debt discount |
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$ 3,825,000
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$ 0
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| Percentage of principal amount, eligible to be redeemed |
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35.00%
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| Redemption price percentage |
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100.00%
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| Percentage of principal amount, redeemable |
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65.00%
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| Percentage of principal amount, event of default |
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25.00%
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| Revolving Credit Facility | Line of Credit |
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| Debt Instrument [Line Items] |
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| Borrowing base |
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$ 1,000,000,000
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$ 1,000,000,000
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| Elected commitments |
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800,000,000
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| Line of credit, term |
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5 years
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| Borrowings, outstanding amount |
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0
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| Remaining borrowing capacity, net of current borrowings outstanding |
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799,200,000
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| Maximum borrowing base |
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$ 1,500,000,000
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| Number of optional borrowing base redeterminations | redetermination |
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2
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| Revolving Credit Facility | Line of Credit | Subsequent Event |
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| Debt Instrument [Line Items] |
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| Borrowing base |
$ 1,200,000,000
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| Letter of Credit | Line of Credit |
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| Debt Instrument [Line Items] |
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| Letters of credit outstanding |
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$ 800,000
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| Minimum | Revolving Credit Facility | Line of Credit |
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| Debt Instrument [Line Items] |
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| Commitment fee percentage on unused amounts |
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0.375%
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| Debt instrument, covenant, minimum current ratio |
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1
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| Maximum | Revolving Credit Facility | Line of Credit |
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| Debt Instrument [Line Items] |
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| Commitment fee percentage on unused amounts |
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0.50%
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| Debt instrument, covenant, maximum leverage ratio |
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4
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| Maximum | Revolving Credit Facility | Line of Credit | Subsequent Event |
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| Debt Instrument [Line Items] |
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| Debt instrument, covenant, maximum leverage ratio |
3
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| Senior Notes Due 2027 | Senior Notes |
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| Debt Instrument [Line Items] |
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| Long-term debt |
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$ 500,000,000
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| Interest rate, stated percentage |
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6.875%
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6.875%
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| Private placement price as percentage of par |
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99.235%
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| Proceeds from borrowings, net of issuance costs |
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$ 489,000,000
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| Debt discount |
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3,800,000
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| Debt issuance costs |
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$ 7,200,000
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| Redemption price percentage |
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106.875%
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| Senior Notes Due 2026 | Senior Notes |
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| Debt Instrument [Line Items] |
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| Long-term debt |
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$ 400,000,000
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| Interest rate, stated percentage |
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5.375%
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5.375%
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| Proceeds from borrowings, net of issuance costs |
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$ 391,000,000
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| Debt issuance costs |
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$ 9,000,000
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| Redemption price percentage |
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105.375%
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| Percentage of principal amount, change in control |
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101.00%
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| Adjusted For Statutory Reserve Requirements - London Interbank Offered Rate (LIBOR) | Revolving Credit Facility | Line of Credit | Subsequent Event |
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| Debt Instrument [Line Items] |
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| Decrease to basis spread on variable rate after redetermination |
0.25%
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| Adjusted For Statutory Reserve Requirements - London Interbank Offered Rate (LIBOR) | Minimum | Revolving Credit Facility | Line of Credit |
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| Debt Instrument [Line Items] |
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| Basis spread on variable rate |
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1.50%
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| Adjusted For Statutory Reserve Requirements - London Interbank Offered Rate (LIBOR) | Minimum | Revolving Credit Facility | Line of Credit | Subsequent Event |
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| Debt Instrument [Line Items] |
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| Basis spread on variable rate |
1.25%
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| Adjusted For Statutory Reserve Requirements - London Interbank Offered Rate (LIBOR) | Maximum | Revolving Credit Facility | Line of Credit |
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| Debt Instrument [Line Items] |
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| Basis spread on variable rate |
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2.50%
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| Adjusted For Statutory Reserve Requirements - London Interbank Offered Rate (LIBOR) | Maximum | Revolving Credit Facility | Line of Credit | Subsequent Event |
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| Debt Instrument [Line Items] |
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| Basis spread on variable rate |
2.25%
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| Federal Funds Effective Swap Rate | Revolving Credit Facility | Line of Credit |
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| Debt Instrument [Line Items] |
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| Basis spread on variable rate |
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0.50%
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| One-Month London Interbank Offered Rate (LIBOR) | Revolving Credit Facility | Line of Credit |
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| Debt Instrument [Line Items] |
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| Basis spread on variable rate |
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1.00%
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| London Interbank Offered Rate (LIBOR) | Revolving Credit Facility | Line of Credit | Subsequent Event |
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| Debt Instrument [Line Items] |
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| Decrease to basis spread on variable rate after redetermination |
0.25%
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| London Interbank Offered Rate (LIBOR) | Minimum | Revolving Credit Facility | Line of Credit |
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| Debt Instrument [Line Items] |
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| Basis spread on variable rate |
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0.50%
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| London Interbank Offered Rate (LIBOR) | Minimum | Revolving Credit Facility | Line of Credit | Subsequent Event |
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| Debt Instrument [Line Items] |
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| Basis spread on variable rate |
0.25%
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| London Interbank Offered Rate (LIBOR) | Maximum | Revolving Credit Facility | Line of Credit |
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| Debt Instrument [Line Items] |
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| Basis spread on variable rate |
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1.50%
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| London Interbank Offered Rate (LIBOR) | Maximum | Revolving Credit Facility | Line of Credit | Subsequent Event |
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| Debt Instrument [Line Items] |
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| Basis spread on variable rate |
1.25%
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