Cash outflow for payments related to contingent consideration liability and other financing activities.

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 4
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e7008-128479

+ Details

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Balance Type:	debit
Period Type:	duration

- Definition

Amount of liability recognized arising from contingent consideration in a business combination.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 35
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6911338&loc=d3e6819-128478

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 25
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6408-128476

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Balance Type:	credit
Period Type:	instant

- 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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Balance Type:	na
Period Type:	instant

- Definition

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.

+ References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

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.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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Fair Value Disclosures - Carrying and Fair Value (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017	May 18, 2017	Jun. 23, 2015
Fair Value Disclosures
Payment of the earn-out		$ 50	$ 2,782
Reduction of earn-out		$ 1,294
Earn-out
Fair Value Disclosures
Reduction of earn-out	$ 1,300
6.625% Senior Notes Due 2022
Fair Value Disclosures
Stated interest rate (percent)	6.625%	6.625%		6.625%
6.00% Senior Convertible Notes Due 2020
Fair Value Disclosures
Stated interest rate (percent)	6.00%	6.00%		6.00%
Carrying Amount \| Earn-out
Fair Value Disclosures
Contingent consideration (earn-out)	$ 1,124	$ 1,124
Fair Value \| Level 3 \| Earn-out
Fair Value Disclosures
Contingent consideration (earn-out)	1,124	1,124
Senior Notes \| 6.625% Senior Notes Due 2022
Fair Value Disclosures
Stated interest rate (percent)					6.625%
Senior Notes \| 6.00% Senior Convertible Notes Due 2020
Fair Value Disclosures
Stated interest rate (percent)						6.00%
Senior Notes \| Carrying Amount \| 6.00% Senior Convertible Notes Due 2020
Fair Value Disclosures
Debt	79,359	79,359		$ 79,199
Senior Notes \| Carrying Amount \| 8.5% Senior Notes Due 2019
Fair Value Disclosures
Debt	393,727	393,727		392,909
Senior Notes \| Fair Value \| Level 2 \| 6.00% Senior Convertible Notes Due 2020
Fair Value Disclosures
Debt	95,520	95,520		90,240
Senior Notes \| Fair Value \| Level 2 \| 8.5% Senior Notes Due 2019
Fair Value Disclosures
Debt	$ 411,480	$ 411,480		$ 420,480