v2.4.1.9
Summary of significant accounting policies (Details 1) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Numerator for basic and diluted earnings per shares    
Net Income $ 9,881us-gaap_NetIncomeLoss $ (4,681)us-gaap_NetIncomeLoss
Denominator    
Denominator for basic earnings per ordinary share - weighted average shares outstanding 24,801,132us-gaap_WeightedAverageNumberOfSharesOutstandingBasic 24,242,315us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Effect of dilutive warrants and earnout shares 3,313,119us-gaap_IncrementalCommonSharesAttributableToCallOptionsAndWarrants 0us-gaap_IncrementalCommonSharesAttributableToCallOptionsAndWarrants
Denominator for diluted earnings per ordinary share - weighted average shares outstanding 28,114,251us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 24,242,315us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Basic earnings per ordinary share (in dollars per share) $ 0.4us-gaap_EarningsPerShareBasic $ (0.2)us-gaap_EarningsPerShareBasic
Diluted earnings per ordinary share (in dollars per share) $ 0.35us-gaap_EarningsPerShareDiluted $ (0.2)us-gaap_EarningsPerShareDiluted