Represents the number of building leases under the operating lease agreements.

No definition available.

Name:	ktyb_NumberOfBuildingLeasesUnderOperatingLeasesAgreements
Namespace Prefix:	ktyb_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the number of land leases under the operating leases agreements

+ References

No definition available.

+ Details

Name:	ktyb_NumberOfLandLeasesUnderOperatingLeasesAgreements
Namespace Prefix:	ktyb_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the number of operating lease agreements.

+ References

No definition available.

+ Details

Name:	ktyb_NumberOfOperatingLeaseAgreements
Namespace Prefix:	ktyb_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

- Definition

Indicates (true false) whether lessee has option to extend operating lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980

+ Details

Name:	us-gaap_LesseeOperatingLeaseExistenceOfOptionToExtend
Namespace Prefix:	us-gaap_
Data Type:	xbrli:booleanItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	srt_StatementGeographicalAxis=ktyb_LexingtonKyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

LEASES (Details) - lease		3 Months Ended	9 Months Ended
LEASES (Details) - lease	Jan. 01, 2019	Sep. 30, 2019	Sep. 30, 2019
Lessee, Lease, Description [Line Items]
Number of operating leases	6		7
Number of buildings leases			3
Number of land leases			4
Options to renew			true
Lexington, KY
Lessee, Lease, Description [Line Items]
Number of land leases		1