Other Real Estate Owned - Changes in OREO (Details) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2015 USD ($) property	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($) property	Sep. 30, 2014 USD ($)	Dec. 31, 2014 USD ($)
Foreclosed Property [Roll Forward]
Beginning balance			$ 9,779	$ 9,617	$ 9,617
Net proceeds from sales			(4,436)	(3,548)	(4,306)
Net gains (losses) on sales	$ 123	$ 173	769	633	743
Transfers in			3,968	1,998	2,919
Cash additions			418	1,292	1,330
OREO Transfers to Loans			(995)
Impairment charge			(659)	(399)	(524)
Ending balance	$ 8,844		$ 8,844		9,779
Loans [Member]
Real Estate Owned Disclosure [Line Items]
Number of Real Estate Properties | property	5		5
Foreclosed Property [Roll Forward]
Beginning balance			$ 349	1,725	1,725
Net proceeds from sales			(1,569)		(1,336)
Net gains (losses) on sales			61		59
Transfers in			1,672
Impairment charge			(125)		(99)
Ending balance	$ 388		$ 388		349
Tax Lien [Member]
Real Estate Owned Disclosure [Line Items]
Number of Real Estate Properties | property	70		70
Foreclosed Property [Roll Forward]
Beginning balance			$ 9,430	$ 7,892	7,892
Net proceeds from sales			(2,867)		(2,970)
Net gains (losses) on sales			708		684
Transfers in			2,296		2,919
Cash additions			418		1,330
OREO Transfers to Loans			(995)
Impairment charge			(534)		(425)
Ending balance	$ 8,456		$ 8,456		$ 9,430