The weighted average grant-date fair value of warrantss granted during the reporting period.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of warrants outstanding and currently exercisable.

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Share-based Compensation Arrangement by Share-based Payment Award, Award Holding Period

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Number of securities into which each warrant or right may be converted. For example, but not limited to, each warrant may be converted into two shares.

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Number of warrants or rights outstanding.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(i))
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- Definition

Face amount or stated value per share of common stock.

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The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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-Publisher FASB
-Name Accounting Standards Codification
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Unrecognized cost of unvested share-based compensation awards.

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The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period.

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-Publisher FASB
-Name Accounting Standards Codification
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Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.

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The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.

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Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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Discloses use of the simplified method to calculate the expected term that stock option awards under the specified plan will exist before being exercised or terminated, the reason and justification for its use, and the periods for which the method was used if it was not used in all periods presented.

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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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The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Equity Instruments and Stock Based Compensation (Details Textual) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($) $ / shares shares	Dec. 31, 2015 USD ($) $ / shares	Dec. 31, 2014 USD ($) $ / shares	Dec. 31, 2015 € / shares	Dec. 31, 2015 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense \| $	$ 12,874
Weighted average period for unrecognized expense	3.2 years
Excess tax benefit related to stock-based compensation \| $	$ 65	$ 1,767
Ordinary shares, shares authorized (in shares)	500,000,000				53,178,000
Ordinary shares, nominal value (in usd or euro per share) \| (per share)	$ 0.01			€ 0.122
Ordinary shares, shares issued (in shares)	41,371,000				41,241,000
Ordinary shares, shares outstanding (in shares)	41,371,000				41,241,000
Preferred shares, shares authorized (in shares)	50,000,000				0
Preferred shares, nominal value (in usd per share) \| $ / shares	$ 0.01				$ 0
Aggregate intrinsic value of options exercised \| $	$ 58	$ 10,063	$ 3,789
Grant date fair value of options granted (in usd per share) \| $ / shares	$ 6.14	$ 9.38	$ 9.19
Number of securities called by each warrant (in shares)	1
Aggregate intrinsic value of warrants exercised \| $	$ 0		$ 3,107		$ 2,698
Grant date fair value of warrants granted (in usd per share) \| $ / shares	$ 2.99	$ 5.92	$ 3.90
Additional warrants outstanding	3,300,000
Warrant
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)	1 year
Expiration period (in years)	4 years
Number of shares authorized (in shares)	59,000
Free Share Award
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)		4 years
Holding period (in years)	2 years
Number of shares authorized (in shares)	290,000
Weighted average grant fair value of free share awards \| $ / shares	$ 12.11		$ 16.30
Free Share Award \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Service period (in years)		2 years
Free Share Award \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Service period (in years)		4 years
Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)	4 years
Expiration period (in years)	10 years
Number of shares authorized (in shares)	94,000