Allowance for Loan Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2016		Dec. 31, 2015		Dec. 31, 2014
Allowance for loan losses [Roll Forward]
Beginning balance	$ 11,046	$ 11,786	$ 13,320
Adjustment for the sale of majority interest in consolidated subsidiary			(95)
Charge-offs	(2,194)	(3,691)	(4,308)
Recoveries	699	658	909
Provision	1,853	2,293	1,960
Ending balance	11,404	11,046	11,786
Financing Receivable Allowance For Credit Losses Individually And Collectively Evaluated For Impairment [Abstract]
Individually evaluated for impairment				$ 3,838		$ 2,664		$ 2,669
Collectively evaluated for impairment				7,566		8,382		9,117
Total ending allowance balance	11,046	11,786	13,320	11,404		11,046		11,786
Loans:
Individually evaluated for impairment				20,769		20,844		22,158
Collectively evaluated for impairment				839,328		784,837		732,688
Total Loans				860,097	[1]	805,681	[1]	754,846
Real Estate Loans Construction [Member]
Allowance for loan losses [Roll Forward]
Beginning balance	905	550	847
Adjustment for the sale of majority interest in consolidated subsidiary			0
Charge-offs	(388)	0	(1,186)
Recoveries	129	246	258
Provision	293	109	631
Ending balance	939	905	550
Financing Receivable Allowance For Credit Losses Individually And Collectively Evaluated For Impairment [Abstract]
Individually evaluated for impairment				0		53		66
Collectively evaluated for impairment				939		852		484
Total ending allowance balance	905	550	847	939		905		550
Loans:
Individually evaluated for impairment				28		203		246
Collectively evaluated for impairment				35,599		39,470		32,804
Total Loans				35,627		39,673		33,050
Real Estate Loans Secured by Farmland [Member]
Allowance for loan losses [Roll Forward]
Beginning balance	192	179	166
Adjustment for the sale of majority interest in consolidated subsidiary			0
Charge-offs	0	0	0
Recoveries	0	0	0
Provision	(65)	13	13
Ending balance	127	192	179
Financing Receivable Allowance For Credit Losses Individually And Collectively Evaluated For Impairment [Abstract]
Individually evaluated for impairment				0		0		0
Collectively evaluated for impairment				127		192		179
Total ending allowance balance	192	179	166	127		192		179
Loans:
Individually evaluated for impairment				7,972		7,903		7,903
Collectively evaluated for impairment				8,796		11,159		11,805
Total Loans				16,768		19,062		19,708
Real Estate Loans Secured by 1 - 4 Family Residential [Member]
Allowance for loan losses [Roll Forward]
Beginning balance	3,341	3,966	6,734
Adjustment for the sale of majority interest in consolidated subsidiary			(95)
Charge-offs	(1,021)	(344)	(1,380)
Recoveries	395	359	342
Provision	(453)	(640)	(1,635)
Ending balance	2,262	3,341	3,966
Financing Receivable Allowance For Credit Losses Individually And Collectively Evaluated For Impairment [Abstract]
Individually evaluated for impairment				251		1,120		1,370
Collectively evaluated for impairment				2,011		2,221		2,596
Total ending allowance balance	3,341	3,966	6,734	2,262		3,341		3,966
Loans:
Individually evaluated for impairment				1,347		5,127		5,613
Collectively evaluated for impairment				312,698		274,969		259,603
Total Loans				314,045		280,096		265,216
Other Real Estate Loans [Member]
Allowance for loan losses [Roll Forward]
Beginning balance	3,761	3,916	3,506
Adjustment for the sale of majority interest in consolidated subsidiary			0
Charge-offs	(126)	(9)	(747)
Recoveries	32	28	110
Provision	(500)	(174)	1,047
Ending balance	3,167	3,761	3,916
Financing Receivable Allowance For Credit Losses Individually And Collectively Evaluated For Impairment [Abstract]
Individually evaluated for impairment				206		464		294
Collectively evaluated for impairment				2,961		3,297		3,622
Total ending allowance balance	3,761	3,916	3,506	3,167		3,761		3,916
Loans:
Individually evaluated for impairment				4,947		4,196		4,531
Collectively evaluated for impairment				278,666		253,839		250,705
Total Loans				283,613		258,035		255,236
Commercial [Member]
Allowance for loan losses [Roll Forward]
Beginning balance	1,706	2,354	1,890
Adjustment for the sale of majority interest in consolidated subsidiary			0
Charge-offs	(639)	(3,281)	(959)
Recoveries	85	14	104
Provision	2,781	2,619	1,319
Ending balance	3,933	1,706	2,354
Financing Receivable Allowance For Credit Losses Individually And Collectively Evaluated For Impairment [Abstract]
Individually evaluated for impairment				2,539		27		292
Collectively evaluated for impairment				1,394		1,679		2,062
Total ending allowance balance	1,706	2,354	1,890	3,933		1,706		2,354
Loans:
Individually evaluated for impairment				4,604		1,517		846
Collectively evaluated for impairment				186,163		188,965		162,423
Total Loans				190,767		190,482		163,269
Consumer [Member]
Allowance for loan losses [Roll Forward]
Beginning balance	1,141	821	177
Adjustment for the sale of majority interest in consolidated subsidiary			0
Charge-offs	(20)	(57)	(36)
Recoveries	58	11	95
Provision	(203)	366	585
Ending balance	976	1,141	821
Financing Receivable Allowance For Credit Losses Individually And Collectively Evaluated For Impairment [Abstract]
Individually evaluated for impairment				842		1,000		647
Collectively evaluated for impairment				134		141		174
Total ending allowance balance	$ 1,141	$ 821	$ 177	976		1,141		821
Loans:
Individually evaluated for impairment				1,871		1,898		3,019
Collectively evaluated for impairment				17,406		16,435		15,348
Total Loans				$ 19,277		$ 18,333		$ 18,367

[1] Includes net deferred loan costs and premiums of $3.3 million and $3.5 million, respectively.