XML 113 R98.htm IDEA: XBRL DOCUMENT
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Subsequent Event (Details) - USD ($) | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Oct. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2015
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Loss on extinguishment of debt |  | $ (2,933,000) | $ 0 | $ 15,563,000 | $ 0 | $ 11,393,000 | $ (429,000) | $ 1,631,000 | $ 828,000 | $ 12,630,000 | $ 13,423,000 | $ 80,000
Secured Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  | $ 180,000,000 |  |  |  | $ 145,000,000 |  |  |  | $ 180,000,000 | $ 145,000,000 |
7 1/4% Senior Notes Maturing February 2023 |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument stated interest rate (percent) |  | 7.25% |  |  |  | 7.25% |  |  |  | 7.25% | 7.25% |
Senior Notes | 5.25% unsecured Senior Notes due 2019 |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument stated interest rate (percent) |  | 5.75% |  |  |  |  |  |  |  | 5.75% |  |
Senior Notes | 7 1/4% Senior Notes Maturing February 2023 |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument stated interest rate (percent) |  | 7.25% |  |  |  |  |  |  |  | 7.25% |  |
Senior Notes | 7 1/4% Senior Notes Maturing February 2023 | Prior to October 15, 2022 |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Redemption Price, Percentage |  |  |  |  |  |  |  |  |  | 100.00% |  |
Senior Notes | 7 1/4% Senior Notes Maturing February 2023 | On or prior to October 15, 2022 |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Redemption Price, Percentage |  |  |  |  |  |  |  |  |  | 103.625% |  |
Subsequent Event | Secured Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity | $ 200,000,000 |  |  |  |  |  |  |  |  |  |  |
Subsequent Event | Secured Revolving Credit Facility | Minimum |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Allowed increase in borrowing capacity | 50,000,000 |  |  |  |  |  |  |  |  |  |  |
Subsequent Event | Secured Revolving Credit Facility | Maximum |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Allowed increase in borrowing capacity | 250,000,000 |  |  |  |  |  |  |  |  |  |  |
Subsequent Event | Senior Notes |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Redemption of senior notes | 34,500,000 |  |  |  |  |  |  |  |  |  |  |
Loss on extinguishment of debt | 25,900,000 |  |  |  |  |  |  |  |  |  |  |
Write off of deferred debt issuance cost | 3,200,000 |  |  |  |  |  |  |  |  |  |  |
Subsequent Event | Senior Notes | 5.875% unsecured Senior Notes |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount of debt | $ 400,000,000 |  |  |  |  |  |  |  |  |  |  |
Debt instrument stated interest rate (percent) | 5.875% |  |  |  |  |  |  |  |  |  |  |
Subsequent Event | Senior Notes | 5.875% unsecured Senior Notes | Prior to October 15, 2022 |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Redemption Price, Percentage | 100.00% |  |  |  |  |  |  |  |  |  |  |
Subsequent Event | Senior Notes | 5.875% unsecured Senior Notes | On or prior to October 15, 2022 |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Redemption Price, Percentage | 105.875% |  |  |  |  |  |  |  |  |  |  |
Percentage of principal amount redeemed | 35.00% |  |  |  |  |  |  |  |  |  |  |
Percentage of principal amount outstanding after redemption | 65.00% |  |  |  |  |  |  |  |  |  |  |
Subsequent Event | Senior Notes | 5.25% unsecured Senior Notes due 2019 |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument stated interest rate (percent) | 5.75% |  |  |  |  |  |  |  |  |  |  |
Extinguishment of debt, amount | $ 225,000,000 |  |  |  |  |  |  |  |  |  |  |
Subsequent Event | Senior Notes | 7 1/4% Senior Notes Maturing February 2023 |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument stated interest rate (percent) | 7.25% |  |  |  |  |  |  |  |  |  |  |
Extinguishment of debt, amount | $ 175,000,000 |  |  |  |  |  |  |  |  |  |  |

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