Condensed Financial Statements of Parent Company (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Assets
Cash and cash equivalents	$ 33,305	$ 33,305	$ 36,990	$ 33,305	$ 31,325
Securities held-to-maturity			0	90,089
Other assets			14,418	11,622
Total Assets			896,787	876,280
Liabilities & Stockholders' Equity
Common stock			24,795	24,795
Additional paid-in capital			16,392	16,392
Retained earnings			55,151	53,203
Accumulated other comprehensive loss			(3,162)	(5,893)	(10,802)
Total liabilities and stockholders' equity			896,787	876,280
Income:
Other income	9,519	9,138
Total operating income	43,431	42,933
Expenses:
Salary and benefits	20,747	19,884
Legal expenses	720	606
Service fees	693	584
Other operating expense	1,615	1,630
Total noninterest expense	35,086	34,172
Income before income taxes	3,688	4,312
Income tax expense	54	196
Net income	3,634	4,116
Cash flows from operating activities:
Net income	3,634	4,116
Adjustments to reconcile net income to net cash provided by operating activities:
Stock compensation expense	0	0
Increase in other assets	(3,969)	440
Decrease in other liabilities	3,637	442
Net cash provided by operating activities	7,833	10,035
Cash flows from investing activities:
Proceeds from maturity of investment securities	300	300
Net Cash Provided by (Used in) Investing Activities, Continuing Operations	(15,413)	(9,245)
Cash flows from financing activities:
Exercise of stock options	0	0
Cash dividends paid on common stock	(1,686)	(1,289)
Net cash provided by (used in) financing activities	11,265	1,190
Net increase (decrease) in cash and cash equivalents	3,685	1,980
Cash and cash equivalents at beginning of period	33,305	31,325
Cash and cash equivalents at end of period	36,990	33,305
Noncash Investing and Financing Items [Abstract]
Available-for-sale Securities, Change in Net Unrealized Holding Gain (Loss), Net of Tax	(755)	7,938
Equity securities transferred from other assets to available-for-sale	0	100
Parent Company [Member]
Assets
Cash and cash equivalents	1,349	1,349	2,198	1,349	$ 273
Securities held-to-maturity			99	85
Investment in common stock of subsidiaries			90,836	87,005
Other assets			58	58
Total Assets			93,191	88,497
Liabilities & Stockholders' Equity
Note payable - subsidiary			15	0
Common stock			24,795	24,795
Additional paid-in capital			16,392	16,392
Retained earnings			55,151	53,203
Accumulated other comprehensive loss			(3,162)	(5,893)
Total liabilities and stockholders' equity			$ 93,191	$ 88,497
Income:
Dividends from subsidiary	2,900	2,475
Interest on investments	0	0
Other income	200	200
Total operating income	3,100	2,675
Expenses:
Salary and benefits	432	428
Legal expenses	180	107
Service fees	137	143
Other operating expense	19	(125)
Total noninterest expense	768	553
Income before income taxes	2,332	2,122
Income tax expense	(193)	(120)
Net income before equity in undistributed net income (loss) of subsidiaries	2,525	2,242
Equity in undistributed net income (loss) of subsidiaries	1,109	1,874
Net income	3,634	4,116
Cash flows from operating activities:
Net income	3,634	4,116
Adjustments to reconcile net income to net cash provided by operating activities:
Equity in undistributed net income of subsidiaries	(1,109)	(1,874)
Stock compensation expense	0	0
Increase in other assets	(5)	124
Decrease in other liabilities	15	(1)
Net cash provided by operating activities	2,535	2,365
Cash flows from investing activities:
Net Cash Provided by (Used in) Investing Activities, Continuing Operations	0	0
Cash flows from financing activities:
Cash dividends paid on common stock	(1,686)	(1,289)
Net cash provided by (used in) financing activities	(1,686)	(1,289)
Net increase (decrease) in cash and cash equivalents	849	1,076
Cash and cash equivalents at beginning of period	1,349	273
Cash and cash equivalents at end of period	2,198	1,349
Noncash Investing and Financing Items [Abstract]
Available-for-sale Securities, Change in Net Unrealized Holding Gain (Loss), Net of Tax	$ (1)	$ (15)