Amount of increase (decrease) in the value of a contingent consideration liability, including, but not limited to, differences arising upon settlement.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
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Amount of liability recognized arising from contingent consideration in a business combination.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Contractual interest rate for funds borrowed, under the debt agreement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

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Fair Value Disclosures - Carrying and Fair Value (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2017	Sep. 30, 2016	May 18, 2017	Dec. 31, 2016	Jun. 23, 2015	Jun. 30, 2014
Fair Value Disclosures
Reduction of earn-out		$ 647	$ 422
Earn-out \| Savvy
Fair Value Disclosures
Reduction of earn-out	$ 600
Carrying Amount \| Earn-out
Fair Value Disclosures
Contingent consideration (earn-out)	1,171	1,171			$ 2,400
Fair Value \| Level 3 \| Earn-out
Fair Value Disclosures
Contingent consideration (earn-out)	1,171	1,171			2,400
Senior Notes \| 8.5% Senior Notes Due 2019
Fair Value Disclosures
Stated interest rate (percent)							8.50%
Senior Notes \| 6.00% Senior Convertible Notes Due 2020
Fair Value Disclosures
Stated interest rate (percent)						6.00%
Senior Notes \| 6.625% Senior Notes Due 2022
Fair Value Disclosures
Stated interest rate (percent)				6.625%
Senior Notes \| Carrying Amount \| 8.5% Senior Notes Due 2019
Fair Value Disclosures
Debt					196,782
Senior Notes \| Carrying Amount \| 6.00% Senior Convertible Notes Due 2020
Fair Value Disclosures
Debt	79,119	79,119			78,878
Senior Notes \| Carrying Amount \| 6.625% Senior Notes Due 2022
Fair Value Disclosures
Debt	392,525	392,525
Senior Notes \| Fair Value \| 6.625% Senior Notes Due 2022
Fair Value Disclosures
Debt	409,000	409,000
Senior Notes \| Fair Value \| Level 2 \| 8.5% Senior Notes Due 2019
Fair Value Disclosures
Debt					206,500
Senior Notes \| Fair Value \| Level 2 \| 6.00% Senior Convertible Notes Due 2020
Fair Value Disclosures
Debt	$ 90,936	$ 90,936			$ 84,984