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Fair Value Measurements - Narrative (Details) - USD ($)	Sep. 30, 2017	Dec. 31, 2016	Oct. 04, 2016	Sep. 30, 2016
Predecessor | Fair Value Measurements Level 2 | 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%
Predecessor | Fair Value Measurements Level 2 | 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%
Successor | Convertible Notes | Convertible Debt
Fair Value, Assets and Liabilities Measured on Recurring Basis
Long-term debt, fixed interest rate	0.00%
Face amount of debt instrument			$ 281,800,000
Successor | New Building Note | Secured Notes
Fair Value, Assets and Liabilities Measured on Recurring Basis
Face amount of debt instrument	$ 35,000,000.0		$ 35,000,000.0
Successor | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Fair value of investments	4,918,000	$ 7,541,000
Successor | Fair Value, Measurements, Recurring | Fair Value Measurements Level 1
Fair Value, Assets and Liabilities Measured on Recurring Basis
Fair value of investments	4,918,000	7,541,000
Successor | Fair Value, Measurements, Recurring | Fair Value Measurements Level 2
Fair Value, Assets and Liabilities Measured on Recurring Basis
Fair value of investments	0	0
Successor | 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	$ 4,900,000	2,800,000
Successor | Other assets | Fair Value, Measurements, Recurring | Fair Value Measurements Level 1
Fair Value, Assets and Liabilities Measured on Recurring Basis
Fair value of investments		$ 4,800,000

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Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

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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

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