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
 3 Months Ended 6 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2014
Dec. 31, 2013
Aug. 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 23.50%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate 29.10%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate 23.50%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate 29.10%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 2.70%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate 2.90%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate 2.70%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 $ 24,186us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions $ 22,035us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions $ 24,186us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions $ 22,035us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions  
Number of shares purchased by employees through the ESPP 405,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesPurchasedForAward 469,000us-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 $ 106klac_TaxBenefitsFromEspp $ 87klac_TaxBenefitsFromEspp $ 1,189klac_TaxBenefitsFromEspp $ 873klac_TaxBenefitsFromEspp  
Weighted-average fair value per share based on Black-Scholes model $ 14.66klac_WeightedAverageFairValuePerShare $ 11.80klac_WeightedAverageFairValuePerShare $ 14.66klac_WeightedAverageFairValuePerShare $ 11.80klac_WeightedAverageFairValuePerShare  
ESPP maximum annual share replenishment 2,000,000klac_EsppMaximumAnnualShareReplenishment   2,000,000klac_EsppMaximumAnnualShareReplenishment   2,000,000klac_EsppMaximumAnnualShareReplenishment
Number of ESPP shares available for future issuance 2,500,000klac_NumberOfEsppSharesAvailableForFutureIssuance   2,500,000klac_NumberOfEsppSharesAvailableForFutureIssuance