Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Interest Income
Interest and fees on loans	$ 48,347	$ 47,534	$ 47,907
Interest on investment securities:
Taxable	7,787	8,969	10,468
Nontaxable	2,253	2,450	2,669
Interest on deposits in other banks	715	372	182
Interest on federal funds sold, securities purchased under agreements to resell, and money market mutual funds	184	46	10
Total interest income	59,286	59,371	61,236
Interest Expense
Interest on deposits	2,136	2,355	2,961
Interest on federal funds purchased		1
Interest on securities sold under agreements to repurchase	77	2,941	4,062
Interest on Federal Home Loan Bank advances	427	735	752
Interest on subordinated notes payable to unconsolidated trusts	870	723	866
Total interest expense	3,510	6,755	8,641
Net interest income	55,776	52,616	52,595
Provision for loan losses	(211)	(644)	(3,429)
Net interest income after provision for loan losses	55,987	53,260	56,024
Noninterest Income
Service charges and fees on deposits	7,987	7,856	7,590
Allotment processing fees	2,716	3,232	4,321
Other service charges, commissions, and fees	5,347	5,558	5,545
Trust income	2,704	2,664	2,373
Net gain on sales of available for sale investment securities	20	3,998	171
Net gain on sales of cost method investment securities	82	0
Gains on sale of mortgage loans, net	662	942	824
Income from company-owned life insurance	1,138	1,016	937
Gain on debt extinguishment	0	4,050	0
Legal settlement	0	1,450	0
Other	509	420	450
Total noninterest income	21,165	31,186	22,211
Noninterest Expense
Salaries and employee benefits	30,296	32,296	32,008
Occupancy expenses, net	4,672	4,742	4,776
Equipment expenses	2,379	2,403	2,106
Data processing and communications expenses	4,571	4,596	4,377
Bank franchise tax	2,325	2,421	2,426
Amortization of intangibles	0	0	449
Deposit insurance expense	520	841	1,536
Other real estate expenses, net	845	2,189	1,708
Legal fees	86	474	843
Loss on debt extinguishment	0	3,776
Other	7,129	7,662	7,721
Total noninterest expense	52,823	61,400	57,950
Income before income taxes	24,329	23,046	20,285
Income tax expense	12,641	6,441	5,293
Net income	11,688	16,605	14,992
Less preferred stock dividends and discount accretion			395
Net income available to common shareholders	$ 11,688	$ 16,605	$ 14,597
Per Common Share
Net income – basic and diluted (in dollars per share)	$ 1.56	$ 2.21	$ 1.95
Cash dividends declared (in dollars per share)	$ 0.425	$ 0.31
Weighted Average Common Shares Outstanding
Basic and diluted (in shares)	7,513	7,504	7,494