CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
INTEREST INCOME:
Loans, including fees	$ 56,296	$ 50,271	$ 179,867	$ 153,010
Taxable investment securities	2,964	2,364	8,306	6,910
Federal Home Loan Bank stock and other	1,830	1,090	5,106	2,509
Total interest income	61,090	53,725	193,279	162,429
INTEREST EXPENSE:
Deposits	4,562	2,587	11,856	6,790
Securities sold under agreements to repurchase and other short-term borrowings	317	161	752	332
Federal Home Loan Bank advances	2,782	2,383	7,779	6,618
Subordinated note	396	287	1,110	807
Total interest expense	8,057	5,418	21,497	14,547
NET INTEREST INCOME	53,033	48,307	171,782	147,882
Provision for loan and lease losses	4,077	4,221	26,264	21,633
NET INTEREST INCOME AFTER PROVISION FOR LOAN AND LEASE LOSSES	48,956	44,086	145,518	126,249
NONINTEREST INCOME:
Service charges on deposit accounts	3,579	3,395	10,708	10,032
Net refund transfer fees	149	177	19,974	18,329
Mortgage banking income	1,360	1,102	3,696	3,707
Interchange fee income	2,757	2,475	8,315	7,348
Program fees	1,686	1,597	4,705	3,972
Increase in cash surrender value of bank owned life insurance	385	394	1,135	1,178
Net gains on other real estate owned	248	31	700	422
Other	1,301	1,203	4,073	3,236
Total noninterest income	11,465	10,374	53,306	48,224
NONINTEREST EXPENSE:
Salaries and employee benefits	22,846	20,505	69,446	61,731
Occupancy and equipment, net	6,153	5,841	18,535	17,594
Communication and transportation	1,047	1,239	3,670	3,450
Marketing and development	1,449	1,677	3,648	4,090
FDIC insurance expense	360	300	1,230	1,050
Bank franchise tax expense	710	749	4,088	3,974
Data processing	2,350	1,795	7,179	5,142
Interchange related expense	1,138	928	3,243	3,057
Supplies	314	241	998	1,029
Other real estate owned expense	2	55	63	284
Legal and professional fees	935	446	2,706	1,794
Impairment of premises held for sale	126	965	356	1,082
Other	3,782	3,285	9,727	8,422
Total noninterest expense	41,212	38,026	124,889	112,699
INCOME BEFORE INCOME TAX EXPENSE	19,209	16,434	73,935	61,774
INCOME TAX EXPENSE	1,798	5,728	13,389	20,980
NET INCOME	$ 17,411	$ 10,706	$ 60,546	$ 40,794
Class A Common Stock
BASIC EARNINGS PER SHARE:
Basic earnings per share (in dollars per share)	$ 0.84	$ 0.51	$ 2.92	$ 1.97
DILUTED EARNINGS PER SHARE:
Diluted earnings per share (in dollars per share)	0.83	0.51	2.90	1.96
DIVIDENDS DECLARED PER COMMON SHARE:
Dividend declared per common share (in dollars per share)	0.242	0.220	0.726	0.649
Class B Common Stock
BASIC EARNINGS PER SHARE:
Basic earnings per share (in dollars per share)	0.76	0.47	2.65	1.79
DILUTED EARNINGS PER SHARE:
Diluted earnings per share (in dollars per share)	0.76	0.47	2.64	1.78
DIVIDENDS DECLARED PER COMMON SHARE:
Dividend declared per common share (in dollars per share)	$ 0.220	$ 0.200	$ 0.660	$ 0.590