Restriction on Cash and Due From Banks	12 Months Ended
Dec. 31, 2015
Restricted Cash and Investments [Abstract]
Restriction on Cash and Due From Banks	Note 2: Restriction on Cash and Due From Banks The Company is required to maintain reserve funds in cash and/or on deposit with the Federal Reserve Bank. The reserve required at December 31, 2015 and 2014, was $1,524,000 and $1,402,000, respectively.

The entire disclosure for restricted cash and cash equivalents.

No definition available.

Name:	jxsb_RestrictedCashAndCashEquivalentsTextBlock
Namespace Prefix:	jxsb_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration