v2.4.1.9

Summary of significant accounting policies (Details Textual) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Significant Accounting Policies [Line Items]
Foreign Currency Transaction Gain (Loss), before Tax	$ 3,361us-gaap_ForeignCurrencyTransactionGainLossBeforeTax	$ 602us-gaap_ForeignCurrencyTransactionGainLossBeforeTax
Weighted Average Number of Shares Outstanding, Diluted	28,114,251us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding	24,242,315us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Net Cash Provided by (Used in) Operating Activities, Continuing Operations, Total	5,339us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	(11,381)us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
Net Cash Provided by (Used in) Financing Activities, Continuing Operations, Total	488us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	30,218us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations
Scenario, Previously Reported [Member]
Significant Accounting Policies [Line Items]
Net Cash Provided by (Used in) Operating Activities, Continuing Operations, Total		11,138us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember
Net Cash Provided by (Used in) Financing Activities, Continuing Operations, Total		7,699us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations / us-gaap_StatementScenarioAxis = us-gaap_ScenarioPreviouslyReportedMember
Restatement Adjustment [Member]
Significant Accounting Policies [Line Items]
Net Cash Provided by (Used in) Operating Activities, Continuing Operations, Total		$ 22,519us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations / us-gaap_StatementScenarioAxis = us-gaap_RestatementAdjustmentMember

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Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 20

-Section 45

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Amount of cash inflow (outflow) of financing activities, excluding discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit.

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Amount of cash inflow (outflow) from operating activities, excluding discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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