Parent Company (Franklin Financial Services Corporation) Financial Information (Schedule Of Condensed Comprehensive Income Statement) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Condensed Financial Statements, Captions [Line Items]
Net income	$ 1,847	$ 2,410	$ 2,319	$ 1,826	$ 1,141	$ 2,185	$ 1,355	$ 1,551	$ 8,402		$ 6,232		$ 5,365
Securities:
Unrealized gains (losses) arising during the period									3,353	[1]	(3,326)	[1]	1,060	[1]
Reclassification adjustment for net (gains) losses included in net income									(260)	[1]	42	[1]	56	[1]
Net unrealized gains (losses)									3,093	[1]	(3,284)	[1]	1,116	[1]
Tax effect									(1,052)	[1]	1,117	[1]	(380)	[1]
Net of tax amount									2,041	[1]	(2,167)	[1]	736	[1]
Total other comprehensive income (loss)									1,596		(646)		1,081
Total Comprehensive Income									9,998		5,586		6,446
Corporation [Member]
Condensed Financial Statements, Captions [Line Items]
Net income									8,402		6,232		5,365
Securities:
Unrealized gains (losses) arising during the period									(236)		425		73
Reclassification adjustment for net (gains) losses included in net income									(82)		20		1
Net unrealized gains (losses)									(318)		445		74
Tax effect									108		(151)		(25)
Net of tax amount									(210)		294		49
Total other comprehensive income (loss)									(210)		294		49
Total Comprehensive Income									$ 8,192		$ 6,526		$ 5,414

[1] Securities/ Securities gain (losses), net $95, $11, and $15 for years ended December 31, 2014, 2013, and 2012, respectively.