PARENT COMPANY FINANCIAL STATEMENTS - CASH FLOWS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash flows from operating activities
Net income	$ 10,717	$ 8,569	$ 6,832
Adjustments to reconcile net income to net cash from operating activities:
Change in other assets	806	1,624	(1,163)
Change in other liabilities	461	(151)	(1,186)
Net cash from operating activities	18,562	12,894	8,061
Cash Flows From Investing Activities
Net cash from investing activities	(35,776)	(44,166)	4,942
Cash flows from financing activities
Payments on note payable	(769)	(704)	(206)
Dividends paid	(3,447)	(3,229)	(2,972)
Purchase of common stock	(263)	(668)	(31)
Net cash from financing activities	13,136	46,474	(2,124)
Net change in cash and cash equivalents	(4,078)	15,202	10,879
Cash and cash equivalents at beginning of year	43,250	28,048	17,169
Cash and cash equivalents at end of year	39,172	43,250	28,048
Parent Company
Cash flows from operating activities
Net income	10,717	8,569	6,832
Adjustments to reconcile net income to net cash from operating activities:
Equity in undistributed income of subsidiary	(4,036)	(3,325)	(3,354)
Change in other assets	(23)	82	12
Change in other liabilities	3	43	(49)
Net cash from operating activities	6,661	5,369	3,441
Cash Flows From Investing Activities
Acquisition of Madison Financial Corporation			(229)
Net cash from investing activities			(229)
Cash flows from financing activities
Proceeds from issuance of long-term debt			5,000
Payments on note payable	(769)	(704)	(206)
Dividends paid	(3,447)	(3,229)	(2,972)
Payment to repurchase preferred stock			(6,066)
Proceeds from issuance of common stock	64	49	2
Purchase of common stock	(263)	(668)	(31)
Net cash from financing activities	(4,415)	(4,552)	(4,273)
Net change in cash and cash equivalents	2,246	817	(1,061)
Cash and cash equivalents at beginning of year	1,317	500	1,561
Cash and cash equivalents at end of year	$ 3,563	$ 1,317	$ 500