Derivatives and Hedging Activities - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2017	Dec. 31, 2016
Derivative [Line Items]
Percentage of option to prepay in equity offerings	40.00%
Period of option to prepay using proceeds from equity offering	180 days
Percentage of principal amount outstanding	50.00%
Redemption price percentage	108.25%
Other Noncurrent Liabilities
Derivative [Line Items]
Fair value of embedded derivative liability	$ 0	$ 13,200
Other Operating Income (Expense)
Derivative [Line Items]
Change in fair value in amount included as other income (expense)	13,200
Designated as Hedging Instrument \| Foreign Exchange Contract
Derivative [Line Items]
Notional foreign exchange contract outstanding	88,000	88,000
Loss recognized in other comprehensive income (loss)	500
Ineffective portion of gain	67
Designated as Hedging Instrument \| Foreign Exchange Contract \| Other Noncurrent Assets
Derivative [Line Items]
Fair value asset of derivative instrument	$ 1,700	$ 2,400
Senior Secured Notes Due 2021
Derivative [Line Items]
Percentage of option to prepay principal amount (equal to)	100.00%
Senior Notes \| Senior Secured Notes Due 2021
Derivative [Line Items]
Periodic payment	$ 575,000

Derivative Instrument, Period of Option to Prepay Using Proceeds from Equity Offering

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- Definition

Derivative Instruments, Percentage of Option to Prepay in Equity Offerings

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Derivative Instruments, Percentage of Option to Prepay Principal Amount

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Derivative Instruments, Percentage of Principal Amount Outstanding

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- Definition

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

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Amount of the required periodic payments including both interest and principal payments.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

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Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

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- Definition

The portion of gains on derivative instruments designated and qualifying as hedging instruments representing (a) the amount of the hedge ineffectiveness and (b) the amount, if any, excluded from the assessment of hedge effectiveness.

+ References

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- Definition

The effective portion of losses on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period.

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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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- Definition

Fair value as of the balance sheet date of the embedded derivative or group of embedded derivatives classified as a liability.

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- Definition

Net Increase or Decrease in the fair value of the embedded derivative or group of embedded derivatives included in earnings in the period.

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