Debt Instrument, Convertible, Carrying Amount of Debt Component

No definition available.

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- Definition

Amount of decrease in additional paid in capital (APIC) resulting from direct costs associated with issuing stock. Includes, but is not limited to, legal and accounting fees and direct costs associated with stock issues under a shelf registration.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21463-112644

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

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- Definition

The carrying amount of the equity component of convertible debt which may be settled in cash upon conversion.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6928298&loc=SL6031897-161870

+ Details

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Period Type:	instant

- Definition

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

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ 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

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

+ Details

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Balance Type:	na
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

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- 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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- Details

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Debt - Debt and Equity Components and Issuance Costs of Convertible Notes (Details) - USD ($)	9 Months Ended
	Sep. 30, 2017	Mar. 31, 2017	Feb. 27, 2017	Dec. 31, 2016	Mar. 31, 2014	Jul. 31, 2013	Dec. 31, 2012
Debt Instrument [Line Items]
Equity component	$ 62,619,000			$ 61,314,000
2017 Convertible Senior Notes
Debt Instrument [Line Items]
Debt component	64,646,000
Equity component	354,000
Equity issuance cost	$ 788,000
Stated interest rate	3.00%
Effective interest rate	3.75%		6.00%
2017 Convertible Senior Notes \| Convertible notes
Debt Instrument [Line Items]
Stated interest rate							3.00%
Debt Instrument, Face Amount		$ 50,000,000.0					$ 115,000,000.0
2020 Convertible Notes
Debt Instrument [Line Items]
Debt component	$ 140,247,000
Equity component	32,253,000
Equity issuance cost	$ 1,106,000
Stated interest rate	3.00%
Effective interest rate	6.35%
2020 Convertible Notes \| Convertible notes
Debt Instrument [Line Items]
Stated interest rate						3.00%
Debt Instrument, Face Amount						$ 172,500,000.0
2021 Convertible Notes
Debt Instrument [Line Items]
Debt component	$ 143,645,000
Equity component	17,355,000
Equity issuance cost	$ 581,000
Stated interest rate	2.875%
Effective interest rate	4.70%
2021 Convertible Notes \| Convertible notes
Debt Instrument [Line Items]
Stated interest rate					2.875%
Debt Instrument, Face Amount					$ 161,000,000.0
2022 Convertible Notes
Debt Instrument [Line Items]
Debt component	$ 137,266,000
Equity component	12,734,000
Equity issuance cost	$ 398,000
Stated interest rate	3.25%
Effective interest rate	5.20%
2022 Convertible Notes \| Convertible notes
Debt Instrument [Line Items]
Stated interest rate		3.25%
Debt Instrument, Face Amount		$ 150,000,000.0