18. PARENT ONLY CONDENSED FINANCIAL STATEMENTS - CONDENSED STATEMENTS OF INCOME (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Expenses:
Professional fees	$ 1,140	$ 995	$ 863
Income tax benefit	(3,252)	(3,392)	(2,674)
Net income	3,198	6,404	5,268
Parent Company [Member]
Income:
Dividends declared by subsidiaries - eliminated in consolidation	11,118	7,675	7,900
Management fee from subsidiaries - eliminated in consolidation	0	0	0
Total income	11,118	7,675	7,900
Expenses:
Professional fees	142	91	97
Directors' expense	282	285	285
Other expenses	226	203	204
Total expenses	650	579	586
Income before equity in undistributed income of subsidiaries	10,468	7,096	7,314
Equity in (distributed) undistributed income of subsidiaries	(7,554)	(930)	(2,287)
Income before income taxes	2,914	6,166	5,027
Income tax benefit	284	238	241
Net income	$ 3,198	$ 6,404	$ 5,268