Parent Company (Franklin Financial Services Corporation) Financial Information (Schedule Of Condensed Balance Sheet) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	$ 39,166	$ 48,593	$ 40,745	$ 77,834
Available for sale	159,473	171,751
Other Assets	6,135	8,522
Total assets	1,035,295	1,001,448
Other Liabilities	5,407	7,667
Total liabilities	923,919	897,927
Shareholders' equity	111,376	103,521	95,388	91,634
Total liabilities and shareholders' equity	1,035,295	1,001,448
Franklin Financial Service Corporation [Member]
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	300	414	$ 601	$ 375
Equity investment in subsidiaries	111,535	101,784
Other Assets	33	1,323
Total assets	111,868	103,521
Other Liabilities	492
Total liabilities	492
Shareholders' equity	111,376	103,521
Total liabilities and shareholders' equity	$ 111,868	$ 103,521