CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
INTEREST INCOME:
Loans, including fees	$ 50,271	$ 41,597	$ 153,010	$ 120,772
Taxable investment securities	2,364	1,942	6,910	5,817
Federal Home Loan Bank stock and other	1,090	395	2,509	1,500
Total interest income	53,725	43,934	162,429	128,089
INTEREST EXPENSE:
Deposits	2,587	1,620	6,790	4,359
Securities sold under agreements to repurchase and other short-term borrowings	161	11	332	51
Federal Home Loan Bank advances	2,383	2,664	6,618	8,590
Subordinated note	287	241	807	680
Total interest expense	5,418	4,536	14,547	13,680
NET INTEREST INCOME	48,307	39,398	147,882	114,409
Provision for loan and lease losses	4,221	2,489	21,633	9,489
NET INTEREST INCOME AFTER PROVISION FOR LOAN AND LEASE LOSSES	44,086	36,909	126,249	104,920
NONINTEREST INCOME:
Service charges on deposit accounts	3,395	3,416	10,032	9,838
Net refund transfer fees	177	132	18,329	19,119
Mortgage banking income	1,102	3,081	3,707	5,902
Interchange fee income	2,475	2,415	7,348	6,755
Program fees	1,597	979	3,972	1,942
Increase in cash surrender value of bank owned life insurance	394	406	1,178	1,114
Net gains (losses) on other real estate owned	31	(137)	422	191
Other	1,203	1,009	3,236	2,163
Total noninterest income	10,374	11,301	48,224	47,024
NONINTEREST EXPENSES:
Salaries and employee benefits	20,505	18,068	61,731	52,965
Occupancy and equipment, net	5,841	5,573	17,594	16,026
Communication and transportation	1,239	1,029	3,450	2,974
Marketing and development	1,677	1,076	4,090	2,773
FDIC insurance expense	300	345	1,050	1,483
Bank franchise tax expense	749	846	3,974	3,944
Data processing	1,795	1,659	5,142	4,535
Interchange related expense	928	1,118	3,057	3,069
Supplies	241	280	1,029	969
Other real estate owned expense	55	159	284	355
Legal and professional fees	446	539	1,794	1,965
FHLB advance prepayment penalty		846		846
Impairment of premises held for sale	965	58	1,082	133
Other	3,285	1,938	8,422	5,904
Total noninterest expenses	38,026	33,534	112,699	97,941
Income before income tax expense	16,434	14,676	61,774	54,003
INCOME TAX EXPENSE	5,728	4,848	20,980	18,100
NET INCOME	$ 10,706	$ 9,828	$ 40,794	$ 35,903
Class A Common Stock
BASIC EARNINGS PER SHARE:
Basic earnings per share (in dollars per share)	$ 0.51	$ 0.47	$ 1.97	$ 1.73
DILUTED EARNINGS PER SHARE:
Diluted earnings per share (in dollars per share)	0.51	0.47	1.96	1.73
DIVIDENDS DECLARED PER COMMON SHARE:
Dividend declared per common share (in dollars per share)	0.220	0.209	0.649	0.616
Class B Common Stock
BASIC EARNINGS PER SHARE:
Basic earnings per share (in dollars per share)	0.47	0.43	1.79	1.58
DILUTED EARNINGS PER SHARE:
Diluted earnings per share (in dollars per share)	0.47	0.43	1.78	1.57
DIVIDENDS DECLARED PER COMMON SHARE:
Dividend declared per common share (in dollars per share)	$ 0.200	$ 0.190	$ 0.590	$ 0.560