Debt Instrument, Convertible, Threshold Consecutive Business Days

No definition available.

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- Definition

Debt Instrument, Convertible, Threshold Consecutive Trading Days, Following Consecutive Business Days

+ References

No definition available.

+ Details

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- Definition

Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger, Following Consecutive Business Days

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Debt instrument, Convertible, Observation Period

+ References

No definition available.

+ Details

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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

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
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- Definition

Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense.

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Period Type:	duration

- Definition

Fair value portion of borrowing which can be exchanged for a specified number of another security at the option of the issuer or the holder, for example, but not limited to, the entity's common stock.

+ References

No definition available.

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

Dividend or interest rate associated with the financial instrument issued in exchange for the original debt being converted in a noncash or part noncash transaction. Noncash are transactions that affect recognized assets or liabilities but that do not result in cash receipts or cash payments. Part noncash refers to that portion of the transaction not resulting in cash receipts or cash payments.

+ References

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+ Details

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Balance Type:	na
Period Type:	duration

- Definition

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

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
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-URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870

+ Details

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

- Definition

The price per share of the conversion feature embedded in the debt instrument.

+ References

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+ Details

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Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Ratio applied to the conversion of debt instrument into equity with equity shares divided by debt principal amount.

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-Name Accounting Standards Codification
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- Definition

The amount by which the convertible debt's if-converted value exceeds its principle amount at the balance sheet date, regardless of whether the instrument is currently convertible. This element applies to public companies only.

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Balance Type:	credit
Period Type:	duration

- Definition

Threshold period of specified consecutive trading days within which common stock price to conversion price of convertible debt instrument must exceed threshold percentage for specified number of trading days to trigger conversion feature.

+ References

No definition available.

+ Details

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- Definition

Minimum percentage of common stock price to conversion price of convertible debt instruments to determine eligibility of conversion.

+ References

No definition available.

+ Details

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- Definition

Threshold number of specified trading days that common stock price to conversion price of convertible debt instruments must exceed threshold percentage within a specified consecutive trading period to trigger conversion feature.

+ References

No definition available.

+ Details

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- Definition

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

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+ 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/disclosureRef
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-Name Accounting Standards Codification
-Topic 470
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-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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- Definition

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

+ References

+ Details

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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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- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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- Definition

Amount, before accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Period Type:	instant

- Definition

Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ References

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- Definition

Gross amount of debt extinguished.

+ References

No definition available.

+ Details

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Balance Type:	debit
Period Type:	duration

- Definition

Amount of the cost of borrowed funds accounted for as interest expense for debt.

+ References

+ Details

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- Definition

Represents the portion of interest incurred in the period on debt arrangements that was charged against earnings, excluding amortization of debt discount (premium) and financing costs.

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- Definition

The cash inflow from the issuance of a long-term debt instrument which can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder.

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- Details

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- Details

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- Details

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Debt Convertible Senior Notes (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($) d	Dec. 31, 2017 USD ($) $ / shares	Dec. 31, 2016 USD ($)	Dec. 31, 2014 USD ($)
Debt Instrument [Line Items]
Interest expense, Convertible Senior Notes, Amortization		$ 5,500
Interest Expense, Debt	$ 5,700	10,900	$ 10,900
Debt Instrument, Convertible, If-converted Value in Excess of Principal	1,600
Convertible Debt [Member] \| Convertible Debt [Member]
Debt Instrument [Line Items]
Carrying value of equity component, net of issuance costs	10,092	29,211
Convertible Debt [Member] \| Other Current Assets [Member] \| Convertible Debt [Member]
Debt Instrument [Line Items]
Deferred financing costs	$ 487	$ 2,090
3.25% Convertible Senior Notes due 2020 [Member] \| Convertible Debt [Member]
Debt Instrument [Line Items]
Convertible Senior Notes, face amount				$ 172,500
Senior Credit Facility, applicable margin	3.25%			3.25%
Debt issuance cost				$ 5,100
Deferred financing costs				$ 4,200
Remaining amortization period of discount on the liability component				6 years
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs				$ 900
Convertible Senior Notes, conversion ratio	31.1891
Convertible Senior Notes, conversion price (in dollars per share) \| $ / shares		$ 32.06
Convertible Senior Notes, threshold trading days \| d	20
Convertible Senior Notes, threshold consecutive trading days \| d	30
Convertible Senior Notes, threshold percentage of stock price trigger	130.00%
Convertible Senior Notes, threshold consecutive business days	5 years
Debt Instrument, Convertible, Threshold Consecutive Trading Days, Following Consecutive Business Days	5 years
Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger, Following Consecutive Business Days	98.00%
Convertible Senior Notes, observation period	25 years
Debt Instrument, Interest Rate, Effective Percentage		6.60%		6.90%
Interest expense, Convertible Senior Notes, Amortization	$ 3,100		5,400
Interest Expense, Debt	6,100
Interest expense, Convertible Senior Notes	$ 3,000	$ 5,400	$ 5,500
Debt Conversion, Converted Instrument, Rate	100.00%
Convertible Senior Notes, fair value disclosures				$ 141,900
Proceeds from issuance				172,500
Carrying value of equity component, net of issuance costs				$ 30,700
Convertible Debt [Member] \| Convertible Debt [Member]
Debt Instrument [Line Items]
Extinguishment of Debt, Amount	$ 108,811