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Share-Based Compensation - Additional Information (Detail) (USD $)
3 Months Ended 9 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Mar. 31, 2015
Mar. 31, 2014
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Percentage of share based compensation expense allocated to cost of sales     20.00%iivi_PercentageOfShareBasedCompensationExpenseAllocatedToCostOfSales  
Percentage of share based compensation expense allocated to selling, general and administrative expense     80.00%iivi_PercentageOfShareBasedCompensationExpenseAllocatedToSellingGeneralAndAdministrativeExpense  
Minimum        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Performance share grant, period     24 months  
Maximum        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Performance share grant, period     48 months  
Stock Options and Cash-Based Stock Appreciation Rights        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Weighted-average fair values of stock options granted under the stock option Plan $ 6.17us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= iivi_StockOptionAndStockAppreciationRightsMember
$ 6.63us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= iivi_StockOptionAndStockAppreciationRightsMember
$ 5.75us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= iivi_StockOptionAndStockAppreciationRightsMember
$ 8.57us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= iivi_StockOptionAndStockAppreciationRightsMember
Share based compensation, estimated forfeiture percentage     17.00%iivi_ShareBasedCompensationArrangementByShareBasedPaymentAwardEstimatedForfeitureRate
/ us-gaap_AwardTypeAxis
= iivi_StockOptionAndStockAppreciationRightsMember
 
Restricted Share Awards and Cash-Based Restricted Share Unit Awards        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Share based compensation, estimated forfeiture percentage     10.00%iivi_ShareBasedCompensationArrangementByShareBasedPaymentAwardEstimatedForfeitureRate
/ us-gaap_AwardTypeAxis
= iivi_RestrictedStockAwardsAndRestrictedStockUnitsMember
 
Share based compensation, vesting period years     3 years