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v2.4.1.9

Fair Value Measurments - Contingent Consideration (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Mar. 31, 2015 | Mar. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Contingent Consideration Paid | $ 4,000 kmt_ContingentConsiderationPaid |
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Period Over which Contingent Consideration is Payable | 2 years |
Emura [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Liabilities, Fair Value Adjustment |  | $ 0 us-gaap_LiabilitiesFairValueAdjustment / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = kmt_EmuraMember

X
- Definition Contingent Consideration Paid + References No definition available. + Details
Name: | kmt_ContingentConsiderationPaid
Namespace Prefix: | kmt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Period Over which Contingent Consideration is Payable + References No definition available. + Details
Name: | kmt_PeriodOverwhichContingentConsiderationisPayable
Namespace Prefix: | kmt_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of addition (reduction) to the amount at which a liability could be incurred (settled) in a current transaction between willing parties. + References No definition available. + Details
Name: | us-gaap_LiabilitiesFairValueAdjustment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_EligibleItemOrGroupForFairValueOptionAxis=kmt_EmuraMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |