Represents an amount of cash commission paid to the broker.

No definition available.

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- Definition

The period in days that the note holder may convert all or a portion of the convertible note.

+ References

No definition available.

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- Definition

Minimum percentage of the product of the last reported note sale price and the conversion rate to determine eligibility of conversion.

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No definition available.

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- Definition

The cash outflow for the extinguishment of convertible senior notes before its maturity and related incremental, external costs, including brokerage fees, and excluding interest.

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No definition available.

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- Definition

Threshold number of specified trading days that the trading price per $1,000 principal amount of the note must be below threshold percentage to trigger conversion feature.

+ References

No definition available.

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- Definition

Aggregate dividends paid during the period for each share of common stock outstanding.

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- Definition

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

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- Definition

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

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- Definition

Remaining amortization period for discount on the liability component of convertible debt which may be settled in cash upon conversion, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Description of the conversion terms of a debt instrument which may include the conversion ratio (including all potential conversion ratios if contingently adjustable), type of debt or equity security into which the debt is convertible, the dollars of debt or the number of shares into which the instrument is convertible (or potentially convertible into), the conversion period, any contingencies associated with the conversion terms, and the existence and amount of a beneficial conversion feature.

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Threshold period of specified consecutive trading days within which common stock price to conversion price of convertible debt instruments must exceed threshold percentage for a specified number of trading days to trigger conversion feature, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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

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No definition available.

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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.

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No definition available.

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

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

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- Definition

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

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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.

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No definition available.

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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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Face (par) amount of the original debt instrument that was repurchased.

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No definition available.

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- Definition

Amount of unamortized debt discount (premium) and debt issuance costs.

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Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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Long-Term Debt (3.875% Convertible Senior Notes) - Additional Information (Detail) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended	12 Months Ended
	Jan. 31, 2015 $ / shares	Mar. 31, 2016 USD ($)	Dec. 31, 2016 USD ($) d $ / shares	Dec. 31, 2015 USD ($) $ / shares
Debt Instrument [Line Items]
Debt instrument, face amount			$ 147,985	$ 143,250
Debt instrument, effective interest rate			8.30%
Debt discount, remaining amortization period			2 years 2 months 12 days
Repurchase of convertible senior notes			$ 11,347
Unamortized debt discount and issuance costs			(9,122)	(13,821)
Convertible Senior Notes [Member]
Debt Instrument [Line Items]
Debt instrument, face amount			$ 89,990	$ 103,000
Debt instrument, stated interest rate			3.875%
Debt instrument, maturity date			Mar. 15, 2019
Aggregate amount of debt repurchased		$ 13,010
Repurchase of convertible senior notes		11,347
Commission related to repurchases of convertible senior notes		81
Gain on extinguishment of debt		153
Unamortized debt discount and issuance costs		$ 1,591
Convertible debt, conversion price \| $ / shares			$ 62.12	$ 62.47
Convertible debt, conversion ratio			16.0969	16.0090
Convertible debt, conversion debt description			The note holders may convert all or a portion of their Convertible Notes during specified periods as follows: (1) during any calendar quarter commencing after the calendar quarter ending on March 31, 2014, if the last reported sale price of the Company’s common stock for at least 20 trading days during the period of 30 consecutive trading days ending on the last trading day of the immediately preceding calendar quarter is greater than 130% of the conversion price on each applicable trading day; (2) during the five business-day period after any ten consecutive trading-day period in which the trading price per $1 principal amount of the Convertible Notes is less than 98% of the product of the last reported sale price and the conversion rate on each such trading day; (3) if specified corporate events, including a change in control, occur; or (4) at any time on or after January 1, 2019.
Convertible debt, threshold trading days \| d			20
Convertible debt, threshold consecutive trading days			30 days
Convertible debt, threshold percentage of stock trigger price			130.00%
Convertible Senior Notes [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Cash dividends on common stock \| $ / shares				$ 0.275
Convertible Senior Notes [Member] \| Convertible Debt Instrument Conversion Period Two [Member]
Debt Instrument [Line Items]
Convertible debt, threshold trading days			5 days
Convertible debt, threshold consecutive trading days			10 days
Convertible debt, threshold percentage of stock trigger price			98.00%
Convertible Senior Notes [Member] \| Convertible Debt Instrument Conversion Period Two [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Cash dividends on common stock \| $ / shares	$ 0.275