Securities (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Securities available for sale [Abstract]
Amortized Cost	$ 319,645	$ 340,619
Unrealized Gains	9,485	7,317
Unrealized Losses	596	1,812
Estimated Fair Value	328,534	346,124
Restricted Stock [Abstract]
Par value of restricted stock out of outstanding capital required by FRB (in hundredths)	6.00%
Par value of restricted stock out of outstanding borrowings required by FHLB (in hundredths)	4.50%
Cost of restricted stock [Abstract]
Total restricted stock	4,529	4,889
Available for sale securities, continuous unrealized loss position [Abstract]
Estimated Fair Value	64,066	106,041
Unrealized Loss	596	1,812
Less than 12 Months, Estimated Fair Value	29,430	97,707
Less than 12 Months, Unrealized Loss	135	1,689
12 Months or More, Estimated Fair Value	34,636	8,334
12 Months or More, Unrealized Loss	461	123
Federal Agencies and GSEs [Member]
Securities available for sale [Abstract]
Amortized Cost	69,911	66,241
Unrealized Gains	177	126
Unrealized Losses	145	486
Estimated Fair Value	69,943	65,881
Available for sale securities, continuous unrealized loss position [Abstract]
Estimated Fair Value	30,126	41,586
Unrealized Loss	145	486
Less than 12 Months, Estimated Fair Value	10,613	41,586
Less than 12 Months, Unrealized Loss	30	486
12 Months or More, Estimated Fair Value	19,513	0
12 Months or More, Unrealized Loss	115	0
Mortgage-backed and CMOs [Member]
Securities available for sale [Abstract]
Amortized Cost	59,916	69,168
Unrealized Gains	1,197	1,085
Unrealized Losses	241	645
Estimated Fair Value	60,872	69,608
Available for sale securities, continuous unrealized loss position [Abstract]
Estimated Fair Value	14,362	23,916
Unrealized Loss	241	645
Less than 12 Months, Estimated Fair Value	8,315	19,042
Less than 12 Months, Unrealized Loss	28	577
12 Months or More, Estimated Fair Value	6,047	4,874
12 Months or More, Unrealized Loss	213	68
State and Municipal [Member]
Securities available for sale [Abstract]
Amortized Cost	180,340	193,251
Unrealized Gains	7,985	5,999
Unrealized Losses	128	517
Estimated Fair Value	188,197	198,733
Available for sale securities, continuous unrealized loss position [Abstract]
Estimated Fair Value	14,539	33,192
Unrealized Loss	128	517
Less than 12 Months, Estimated Fair Value	8,217	29,732
Less than 12 Months, Unrealized Loss	66	462
12 Months or More, Estimated Fair Value	6,322	3,460
12 Months or More, Unrealized Loss	62	55
Corporate [Member]
Securities available for sale [Abstract]
Amortized Cost	8,478	10,959
Unrealized Gains	13	4
Unrealized Losses	82	164
Estimated Fair Value	8,409	10,799
Available for sale securities, continuous unrealized loss position [Abstract]
Estimated Fair Value	5,039	7,347
Unrealized Loss	82	164
Less than 12 Months, Estimated Fair Value	2,285	7,347
Less than 12 Months, Unrealized Loss	11	164
12 Months or More, Estimated Fair Value	2,754	0
12 Months or More, Unrealized Loss	71	0
Equity Securities [Member]
Securities available for sale [Abstract]
Amortized Cost	1,000	1,000
Unrealized Gains	113	103
Unrealized Losses	0	0
Estimated Fair Value	1,113	1,103
FRB Stock [Member]
Cost of restricted stock [Abstract]
Total restricted stock	1,625	2,722
FHLB Stock [Member]
Cost of restricted stock [Abstract]
Total restricted stock	2,737	2,000
CBB Financial Corporation Stock [Member]
Cost of restricted stock [Abstract]
Total restricted stock	101	101
Danville Community Development Corporation Stock [Member]
Cost of restricted stock [Abstract]
Total restricted stock	$ 66	$ 66