Name:	kub_AllowanceForDoubtfulLongTermTradeAccountsReceivable
Namespace Prefix:	kub_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

The aggregate of amounts due from customers or clients with the original contractual terms of more than one year, for goods or services that have been delivered or sold in the normal course of business, less allowance for doubtful accounts.

No definition available.

Name:	kub_LongTermAccountsReceivableNet
Namespace Prefix:	kub_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

The current portion of amounts due from customers or clients with the original contractual terms of more than one year for goods or services that have been delivered or sold in the normal course of business.

No definition available.

Name:	kub_LongTermTradeAccountsReceivableGrossCurrent
Namespace Prefix:	kub_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

No definition available.

Name:	kub_TotalLongTermTradeAccountsReceivableGross
Namespace Prefix:	kub_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_AccountsNotesAndLoansReceivableLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Amounts due from customers or clients, more than one year from the balance sheet date, for goods or services that have been delivered or sold in the normal course of business.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.17)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 3

-Article 5