PARENT COMPANY FINANCIAL STATEMENTS, Condensed Statement of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash flows from operating activities [Abstract]
Net income	$ 3,769	$ 3,467	$ 3,919	$ 3,664	$ 3,407	$ 3,164	$ 2,624	$ 2,979	$ 14,819	$ 12,174	$ 12,446
Adjustments to reconcile net income to net cash from operating activities [Abstract]
Depreciation									1,720	1,934	1,695
Amortization									1,586	2,624	462
Stock compensation expense									217	178	204
Change in other assets									(1,047)	(67)	(48)
Change in other liabilities									(922)	(938)	(105)
Net cash from operating activities									20,391	17,969	16,832
Cash flows from investing activities [Abstract]
Acquisition of subsidiary, net of cash received									0	11,912	0
Net cash from investing activities									(25,261)	9,097	(472)
Cash flows from financing activities [Abstract]
Cash dividends paid to shareholders									(6,398)	(5,933)	(4,573)
Purchase of warrant									0	0	(5,675)
Cash in lieu of fractional shares									0	(16)	0
Proceeds from stock option exercises									317	751	222
Proceeds from other borrowed funds									0	0	15,946
Payments on other borrowed funds									(3,859)	(2,433)	(16,376)
Net cash from financing activities									(17,185)	5,113	(19,205)
Net change in cash and cash equivalents									(22,055)	32,179	(2,845)
Cash and cash equivalents at beginning of year				104,718				72,539	104,718	72,539	75,384
Cash and cash equivalents at end of year	82,663				104,718				82,663	104,718	72,539
Parent Company [Member]
Cash flows from operating activities [Abstract]
Net income									14,819	12,174	12,446
Adjustments to reconcile net income to net cash from operating activities [Abstract]
Depreciation									89	94	84
Amortization									33	35	0
Stock compensation expense									217	178	204
Equity in undistributed earnings of subsidiaries									(4,072)	(3,242)	(866)
Change in other assets									(123)	(174)	100
Change in other liabilities									243	(58)	(49)
Net cash from operating activities									11,206	9,007	11,919
Cash flows from investing activities [Abstract]
Investments in nonbank subsidiaries									(250)	0	0
Acquisition of subsidiary, net of cash received									0	25	0
Purchases of fixed assets, net of proceeds from asset sales									(80)	(159)	(149)
Net cash from investing activities									(330)	(134)	(149)
Cash flows from financing activities [Abstract]
Cash dividends paid to shareholders									(6,398)	(5,933)	(4,573)
Purchase of warrant									0	0	(5,675)
Cash in lieu of fractional shares									0	(16)	0
Proceeds from stock option exercises									317	751	222
Proceeds from other borrowed funds									0	0	15,946
Payments on other borrowed funds									(3,600)	(2,400)	(16,346)
Net cash from financing activities									(9,681)	(7,598)	(10,426)
Net change in cash and cash equivalents									1,195	1,275	1,344
Cash and cash equivalents at beginning of year				$ 6,699				$ 5,424	6,699	5,424	4,080
Cash and cash equivalents at end of year	$ 7,894				$ 6,699				$ 7,894	$ 6,699	$ 5,424