Condensed Financial Statements of Parent Company (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Assets
Cash and cash equivalents	$ 33,305	$ 31,325
Securities held-to-maturity	90,089	96,847
Other assets	11,622	14,597
Total Assets	876,280	864,288
Liabilities & Stockholders' Equity
Common stock	24,795	24,795
Additional paid-in capital	16,392	16,392
Retained earnings	53,203	50,376
Accumulated other comprehensive loss	(5,893)	(10,802)	(192)
Total liabilities and stockholders' equity	876,280	864,288
Income:
Other income	9,138	9,220
Total operating income	42,933	42,596
Expenses:
Salary and benefits	19,884	19,108
Legal expenses	606	539
Service fees	584	459
Other operating expense	2,040	2,167
Total noninterest expense	34,172	33,105
Income before income taxes	4,312	3,511
Income tax expense	196	348
Net income	4,116	3,163
Cash flows from operating activities:
Net income	4,116	3,163
Adjustments to reconcile net income to net cash provided by operating activities:
Stock compensation expense	0	0
Increase in other assets	440	(988)
Decrease in other liabilities	442	343
Net cash provided by operating activities	10,035	8,517
Cash flows from investing activities:
Proceeds from maturity of investment securities	300	170
Net Cash Provided by (Used in) Investing Activities, Continuing Operations	(9,245)	15,634
Cash flows from financing activities:
Exercise of stock options	0	0
Cash dividends paid on common stock	(1,289)	(1,092)
Net cash provided by (used in) financing activities	1,190	(35,143)
Net increase (decrease) in cash and cash equivalents	1,980	(10,992)
Cash and cash equivalents at beginning of period	31,325	42,317
Cash and cash equivalents at end of period	33,305	31,325
Noncash Investing and Financing Items [Abstract]
Available-for-sale Securities, Change in Net Unrealized Holding Gain (Loss), Net of Tax	7,938	(11,076)
Equity securities transferred from other assets to available-for-sale	100	0
Parent Company [Member]
Assets
Cash and cash equivalents	1,349	273
Securities held-to-maturity	85	0
Investment in common stock of subsidiaries	87,005	80,212
Other assets	58	277
Total Assets	88,497	80,762
Liabilities & Stockholders' Equity
Note payable - subsidiary	0	1
Common stock	24,795	24,795
Additional paid-in capital	16,392	16,392
Retained earnings	53,203	50,376
Accumulated other comprehensive loss	(5,893)	(10,802)
Total liabilities and stockholders' equity	88,497	80,762
Income:
Dividends from subsidiary	2,475	1,480
Interest on investments	0	0
Other income	200	201
Total operating income	2,675	1,681
Expenses:
Salary and benefits	428	432
Legal expenses	107	78
Service fees	143	164
Other operating expense	(125)	19
Total noninterest expense	553	693
Income before income taxes	2,122	988
Income tax expense	(120)	(167)
Net income before equity in undistributed net income (loss) of subsidiaries	2,242	1,155
Equity in undistributed net income (loss) of subsidiaries	1,874	2,008
Net income	4,116	3,163
Cash flows from operating activities:
Net income	4,116	3,163
Adjustments to reconcile net income to net cash provided by operating activities:
Equity in undistributed net income of subsidiaries	(1,874)	(2,008)
Stock compensation expense	0	0
Increase in other assets	124	(11)
Decrease in other liabilities	(1)	1
Net cash provided by operating activities	2,365	1,145
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	(1,289)	(1,092)
Net cash provided by (used in) financing activities	(1,289)	(1,092)
Net increase (decrease) in cash and cash equivalents	1,076	53
Cash and cash equivalents at beginning of period	273	220
Cash and cash equivalents at end of period	1,349	273
Noncash Investing and Financing Items [Abstract]
Available-for-sale Securities, Change in Net Unrealized Holding Gain (Loss), Net of Tax	$ (15)	$ 0