Condensed Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Interest and dividend income:
Loans, including fees	$ 39,304	$ 36,418	$ 77,353	$ 71,332
Investments:
Taxable securities	7,438	6,903	14,760	13,606
Tax exempt securities	1,042	1,042	2,083	2,083
Dividends	298	328	634	719
Interest bearing cash at Federal Reserve and other banks	396	353	769	788
Total interest and dividend income	48,478	45,044	95,599	88,528
Interest expense:
Deposits	1,234	974	2,330	1,868
Other borrowings	586	13	928	15
Junior subordinated debt	789	623	1,486	1,218
Total interest expense	2,609	1,610	4,744	3,101
Net interest income	45,869	43,434	90,855	85,427
Benefit from reversal of provision for loan losses	(638)	(796)	(874)	(2,353)
Net interest income after benefit from reversal of provision for loan losses	46,507	44,230	91,729	87,780
Noninterest income:
Gain on sale of loans	666	777	1,292	1,687
Commissions on sale of non-deposit investment products	810	705	1,686	1,312
Increase in cash value of life insurance	656	626	1,264	1,311
Other	814	1,323	1,638	1,917
Total noninterest income	12,174	12,910	24,464	24,613
Noninterest expense:
Salaries and related benefits	21,453	20,494	43,105	41,387
Other	16,417	15,410	32,927	30,339
Total noninterest expense	37,870	35,904	76,032	71,726
Income before income taxes	20,811	21,236	40,161	40,667
Provision for income taxes	5,782	7,647	11,222	14,999
Net income	$ 15,029	$ 13,589	$ 28,939	$ 25,668
Earnings per share:
Basic	$ 0.65	$ 0.59	$ 1.26	$ 1.12
Diluted	$ 0.65	$ 0.58	$ 1.24	$ 1.10
Financial Service [Member]
Noninterest income:
Service charges and fees	$ 9,228	$ 9,479	$ 18,584	$ 18,386