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Fair Value Measurements - Narrative (Details) - USD ($) $ in Thousands | Jun. 30, 2017 | Dec. 31, 2016
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Fair Value Measurements Level 3 | 8.125% Senior Notes due 2022 | Senior Notes |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis |  |
Long-term debt, fixed interest rate | 8.125% |
Fair Value Measurements Level 3 | 7.5% Senior Notes due 2023 | Senior Notes |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis |  |
Long-term debt, fixed interest rate | 7.50% |
Fair Value, Measurements, Recurring |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis |  |
Fair value of investments | $ 6,256 | $ 7,541
Fair Value, Measurements, Recurring | Fair Value Measurements Level 1 |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis |  |
Fair value of investments | 6,256 | 7,541
Fair Value, Measurements, Recurring | Fair Value Measurements Level 3 |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis |  |
Fair value of investments | 0 | 0
Other current assets | Fair Value, Measurements, Recurring | Fair Value Measurements Level 1 |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis |  |
Fair value of investments | $ 6,300 | 2,800
Other assets | Fair Value, Measurements, Recurring | Fair Value Measurements Level 1 |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis |  |
Fair value of investments |  | $ 4,800

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- Definition The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a set, unchanging rate. + 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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