Quarterly report pursuant to Section 13 or 15(d)

Equity and Long-Term Incentive Compensation Plans - Employee Stock Purchase Plan (Details)

v2.4.1.9
Equity and Long-Term Incentive Compensation Plans - Employee Stock Purchase Plan (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
 1 Months Ended 3 Months Ended 9 Months Ended
Aug. 31, 2014
Mar. 31, 2015
Mar. 31, 2014
Mar. 31, 2015
Mar. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]          
ESPP maximum employee subscription rate   10.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate   10.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate  
Employee stock purchase plan offering period       6 months  
Share-based compensation arrangement, discount from market price, lesser of commencement of offering period or purchase date       85.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPriceOfferingDate  
Share-based Compensation Arrangement, Fair Value Assumptions and Methodology [Abstract]          
Expected stock price volatility   25.50%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate 25.80%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate 24.50%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate 27.50%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
Risk-free interest rate   0.10%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate 0.10%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate 0.10%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate 0.10%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
Dividend yield   2.90%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate 2.80%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate 2.80%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate 2.90%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
Expected life (in years)   6 months 6 months 6 months 6 months
Employee Stock Purchase Plan Additional Information [Abstract]          
Total cash received from employees for the issuance of shares under the ESPP   $ 0us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions $ 0us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions $ 24,186us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions $ 22,035us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions
Number of shares purchased by employees through the ESPP   0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesPurchasedForAward 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesPurchasedForAward 405,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesPurchasedForAward 469,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesPurchasedForAward
Tax benefits realized by the Company in connection with the disqualifying dispositions of shares purchased under the ESPP   $ 411klac_TaxBenefitsFromEspp $ 1,150klac_TaxBenefitsFromEspp $ 1,600klac_TaxBenefitsFromEspp $ 2,023klac_TaxBenefitsFromEspp
Weighted-average fair value per share based on Black-Scholes model   $ 14.40klac_WeightedAverageFairValuePerShare $ 13.04klac_WeightedAverageFairValuePerShare $ 14.55klac_WeightedAverageFairValuePerShare $ 12.29klac_WeightedAverageFairValuePerShare
ESPP maximum annual share replenishment   2,000,000klac_EsppMaximumAnnualShareReplenishment   2,000,000klac_EsppMaximumAnnualShareReplenishment  
ESPP, number of shares added persuant to replenishment 2,000,000klac_EmployeeStockPurchasePlanNumberofSharesAdded        
Number of ESPP shares available for future issuance   2,500,000klac_NumberOfEsppSharesAvailableForFutureIssuance   2,500,000klac_NumberOfEsppSharesAvailableForFutureIssuance