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Guarantor Subsidiaries Financial Information Additional Information (Details) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
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Condensed Financial Statements, Captions [Line Items] |  |
Long-term Debt | $ 2,724,672 | $ 2,705,718
Senior notes due April 2020 at 8.25% |  |
Condensed Financial Statements, Captions [Line Items] |  |
Long-term Debt | $ 74,470 | 74,470
Debt Instrument, Interest Rate, Stated Percentage | 6.375% |
Senior Secured Notes due April 2022 [Member] |  |
Condensed Financial Statements, Captions [Line Items] |  |
Long-term Debt | $ 1,854,731 |
Senior Notes Due April 2017 at 8.00% |  |
Condensed Financial Statements, Captions [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 8.25% |
Senior notes due March 2021 at 6.375% |  |
Condensed Financial Statements, Captions [Line Items] |  |
Long-term Debt | $ 20,611 | 20,611
Debt Instrument, Interest Rate, Stated Percentage | 5.875% |
Senior Notes due April 2023 [Member] |  |
Condensed Financial Statements, Captions [Line Items] |  |
Long-term Debt | $ 494,344 | $ 493,439
Senior Notes 8 Percent Due April 2023 Par Value [Member] [Member] |  |
Condensed Financial Statements, Captions [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 8.00% |

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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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