CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
INTEREST INCOME:
Loans, including fees	$ 62,896	$ 56,296	$ 199,935	$ 179,867
Taxable investment securities	3,221	2,964	10,096	8,306
Federal Home Loan Bank stock and other	1,942	1,830	6,325	5,106
Total interest income	68,059	61,090	216,356	193,279
INTEREST EXPENSE:
Deposits	8,042	4,562	21,693	11,856
Securities sold under agreements to repurchase and other short-term borrowings	298	317	1,049	752
Federal Home Loan Bank advances	3,839	2,782	10,631	7,779
Subordinated note	394	396	1,252	1,110
Total interest expense	12,573	8,057	34,625	21,497
NET INTEREST INCOME	55,486	53,033	181,731	171,782
Provision for loan and lease losses	3,153	4,077	24,844	26,264
NET INTEREST INCOME AFTER PROVISION FOR LOAN AND LEASE LOSSES	52,333	48,956	156,887	145,518
NONINTEREST INCOME:
Service charges on deposit accounts	3,749	3,579	10,650	10,708
Net refund transfer fees	317	149	21,046	19,974
Mortgage banking income	3,064	1,360	7,019	3,696
Interchange fee income	3,031	2,757	9,045	8,315
Program fees	1,317	1,686	3,428	4,705
Increase in cash surrender value of bank owned life insurance	394	385	1,154	1,135
Net gains on other real estate owned	267	248	487	700
Other	672	1,301	2,524	4,073
Total noninterest income	12,811	11,465	55,353	53,306
NONINTEREST EXPENSE:
Salaries and employee benefits	24,822	22,846	75,184	69,446
Occupancy and equipment, net	6,571	6,279	19,627	18,891
Communication and transportation	1,017	1,047	3,249	3,670
Marketing and development	1,420	1,449	3,800	3,648
FDIC insurance expense		360	743	1,230
Bank franchise tax expense	935	710	4,366	4,088
Data processing	2,344	2,350	6,657	7,179
Interchange related expense	1,138	1,138	3,755	3,243
Supplies	292	314	1,358	998
Other real estate owned and other repossession expense	130	2	324	63
Legal and professional fees	1,026	935	2,756	2,706
Other	2,716	3,782	9,529	9,727
Total noninterest expense	42,411	41,212	131,348	124,889
INCOME BEFORE INCOME TAX EXPENSE	22,733	19,209	80,892	73,935
INCOME TAX EXPENSE	4,325	1,798	14,961	13,389
NET INCOME	$ 18,408	$ 17,411	$ 65,931	$ 60,546
Class A Common Stock
BASIC EARNINGS PER SHARE:
Basic earnings per share (in dollars per share)	$ 0.88	$ 0.84	$ 3.17	$ 2.92
DILUTED EARNINGS PER SHARE:
Diluted earnings per share (in dollars per share)	0.88	0.83	3.15	2.90
Class B Common Stock
BASIC EARNINGS PER SHARE:
Basic earnings per share (in dollars per share)	0.80	0.76	2.88	2.65
DILUTED EARNINGS PER SHARE:
Diluted earnings per share (in dollars per share)	$ 0.80	$ 0.76	$ 2.87	$ 2.64