XML 53 R35.htm IDEA: XBRL DOCUMENT
v3.5.0.2

Summary of Significant Accounting Policies - Summary of Fair Value Hierarchy for Financial Assets and Liabilities Measured Recurring and Nonrecurring Basis (Parenthetical) (Detail) | Apr. 30, 2016 CompensationPlan
--- | ---
Regulatory Assets [Abstract] |
Number of non-qualified compensation plans maintained | 2

X
- Definition Number of nonqualified compensation plans. + References No definition available. + Details
Name: | kequ_NumberOfNonqualifiedCompensationPlans
Namespace Prefix: | kequ_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Regulatory Assets [Abstract] + References No definition available. + Details
Name: | kequ_RegulatoryAssetsAbstract
Namespace Prefix: | kequ_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration