ASM INTERNATIONAL N V

CIK:0000351483|SEC Filings
v2.4.1.9
Financial instruments and risk management (Schedule of Company's Price Sensitivity Impact on Net Earnings) (Details) (EUR €)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Financial Instruments And Risk Management [Line Items]    
Percentage of increase in price 10.00%asmi_PercentageOfIncreaseInPrice  
Percentage of decrease in price 10.00%asmi_PercentageOfDecreaseInPrice  
10% Increase Of U.S. Dollar Versus Euro [Member]
   
Financial Instruments And Risk Management [Line Items]    
Impact on net earnings due to changes in average exchange rates € 954asmi_ImpactOnNetEarningsDueToChangesInAverageExchangeRates
/ us-gaap_TradingActivityByTypeAxis
= asmi_TenPercentageIncreaseOfUSDollarVersusEuroMember
€ 601asmi_ImpactOnNetEarningsDueToChangesInAverageExchangeRates
/ us-gaap_TradingActivityByTypeAxis
= asmi_TenPercentageIncreaseOfUSDollarVersusEuroMember
10% Decrease Of U.S. Dollar Versus Euro [Member]
   
Financial Instruments And Risk Management [Line Items]    
Impact on net earnings due to changes in average exchange rates (954)asmi_ImpactOnNetEarningsDueToChangesInAverageExchangeRates
/ us-gaap_TradingActivityByTypeAxis
= asmi_TenPercentageDecreaseOfUSDollarVersusEuroMember
(601)asmi_ImpactOnNetEarningsDueToChangesInAverageExchangeRates
/ us-gaap_TradingActivityByTypeAxis
= asmi_TenPercentageDecreaseOfUSDollarVersusEuroMember
10% Increase Of Singapore Dollar Versus Euro [Member]
   
Financial Instruments And Risk Management [Line Items]    
Impact on net earnings due to changes in average exchange rates 1,213asmi_ImpactOnNetEarningsDueToChangesInAverageExchangeRates
/ us-gaap_TradingActivityByTypeAxis
= asmi_TenPercentageIncreaseOfSingaporeDollarVersusEuroMember
671asmi_ImpactOnNetEarningsDueToChangesInAverageExchangeRates
/ us-gaap_TradingActivityByTypeAxis
= asmi_TenPercentageIncreaseOfSingaporeDollarVersusEuroMember
10% Decrease Of Singapore Dollar Versus Euro [Member]
   
Financial Instruments And Risk Management [Line Items]    
Impact on net earnings due to changes in average exchange rates (1,213)asmi_ImpactOnNetEarningsDueToChangesInAverageExchangeRates
/ us-gaap_TradingActivityByTypeAxis
= asmi_TenPercentageDecreaseOfSingaporeDollarVersusEuroMember
(671)asmi_ImpactOnNetEarningsDueToChangesInAverageExchangeRates
/ us-gaap_TradingActivityByTypeAxis
= asmi_TenPercentageDecreaseOfSingaporeDollarVersusEuroMember
10% Increase Of Hong Kong Dollar Versus Euro [Member]
   
Financial Instruments And Risk Management [Line Items]    
Impact on net earnings due to changes in average exchange rates 3,891asmi_ImpactOnNetEarningsDueToChangesInAverageExchangeRates
/ us-gaap_TradingActivityByTypeAxis
= asmi_TenPercentageIncreaseOfHongKongDollarVersusEuroMember
100,072asmi_ImpactOnNetEarningsDueToChangesInAverageExchangeRates
/ us-gaap_TradingActivityByTypeAxis
= asmi_TenPercentageIncreaseOfHongKongDollarVersusEuroMember
10% Decrease Of Hong Kong Dollar Versus Euro [Member]
   
Financial Instruments And Risk Management [Line Items]    
Impact on net earnings due to changes in average exchange rates (3,891)asmi_ImpactOnNetEarningsDueToChangesInAverageExchangeRates
/ us-gaap_TradingActivityByTypeAxis
= asmi_TenPercentageDecreaseOfHongKongDollarVersusEuroMember
(100,072)asmi_ImpactOnNetEarningsDueToChangesInAverageExchangeRates
/ us-gaap_TradingActivityByTypeAxis
= asmi_TenPercentageDecreaseOfHongKongDollarVersusEuroMember
10% Increase of Korean Won Versus Euro [Member]
   
Financial Instruments And Risk Management [Line Items]    
Impact on net earnings due to changes in average exchange rates 1,333asmi_ImpactOnNetEarningsDueToChangesInAverageExchangeRates
/ us-gaap_TradingActivityByTypeAxis
= asmi_TenPercentIncreaseofKoreanWonVersusEuroMember
1,962asmi_ImpactOnNetEarningsDueToChangesInAverageExchangeRates
/ us-gaap_TradingActivityByTypeAxis
= asmi_TenPercentIncreaseofKoreanWonVersusEuroMember
10% Decrease Of Korean Won Versus Euro [Member]
   
Financial Instruments And Risk Management [Line Items]    
Impact on net earnings due to changes in average exchange rates (1,333)asmi_ImpactOnNetEarningsDueToChangesInAverageExchangeRates
/ us-gaap_TradingActivityByTypeAxis
= asmi_TenPercentDecreaseOfKoreanWonVersusEuroMember
(1,962)asmi_ImpactOnNetEarningsDueToChangesInAverageExchangeRates
/ us-gaap_TradingActivityByTypeAxis
= asmi_TenPercentDecreaseOfKoreanWonVersusEuroMember
10% Increase Of Japanese Yen Versus Euro [Member]
   
Financial Instruments And Risk Management [Line Items]    
Impact on net earnings due to changes in average exchange rates 861asmi_ImpactOnNetEarningsDueToChangesInAverageExchangeRates
/ us-gaap_TradingActivityByTypeAxis
= asmi_TenPercentageIncreaseOfJapaneseYenVersusEuroMember
485asmi_ImpactOnNetEarningsDueToChangesInAverageExchangeRates
/ us-gaap_TradingActivityByTypeAxis
= asmi_TenPercentageIncreaseOfJapaneseYenVersusEuroMember
10% Decrease Of Japanese Yen Versus Euro [Member]
   
Financial Instruments And Risk Management [Line Items]    
Impact on net earnings due to changes in average exchange rates € (861)asmi_ImpactOnNetEarningsDueToChangesInAverageExchangeRates
/ us-gaap_TradingActivityByTypeAxis
= asmi_TenPercentageDecreaseOfJapaneseYenVersusEuroMember
€ (485)asmi_ImpactOnNetEarningsDueToChangesInAverageExchangeRates
/ us-gaap_TradingActivityByTypeAxis
= asmi_TenPercentageDecreaseOfJapaneseYenVersusEuroMember