CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
INTEREST INCOME:
Loans, including fees	$ 58,004	$ 41,429
Taxable investment securities	2,155	1,855
Federal Home Loan Bank stock and other	724	731
Total interest income	60,883	44,015
INTEREST EXPENSE:
Deposits	1,879	1,392
Securities sold under agreements to repurchase and other short-term borrowings	25	25
Federal Home Loan Bank advances	2,292	2,953
Subordinated note	249	211
Total interest expense	4,445	4,581
NET INTEREST INCOME	56,438	39,434
Provision for loan and lease losses	12,351	5,186
NET INTEREST INCOME AFTER PROVISION FOR LOAN AND LEASE LOSSES	44,087	34,248
NONINTEREST INCOME:
Service charges on deposit accounts	3,247	3,140
Net refund transfer fees	15,382	17,078
Mortgage banking income	1,160	1,261
Interchange fee income	2,326	2,123
Program fees	1,091	319
Increase in cash surrender value of bank owned life insurance	391	339
Net gains on other real estate owned	142	248
Other	1,184	413
Total noninterest income	24,923	24,921
NONINTEREST EXPENSES:
Salaries and employee benefits	21,211	17,083
Occupancy and equipment, net	5,967	5,419
Communication and transportation	1,272	1,073
Marketing and development	1,004	507
FDIC insurance expense	450	658
Bank franchise tax expense	2,435	2,451
Data processing	1,652	1,333
Interchange related expense	1,058	904
Supplies	527	449
Other real estate owned expense	97	80
Legal and professional fees	752	823
Other	2,514	1,761
Total noninterest expenses	38,939	32,541
Income before income tax expense	30,071	26,628
INCOME TAX EXPENSE	10,054	8,893
NET INCOME	$ 20,017	$ 17,735
Class A Common Stock
BASIC EARNINGS PER SHARE:
Basic earnings per share (in dollars per share)	$ 0.97	$ 0.86
DILUTED EARNINGS PER SHARE:
Diluted earnings per share (in dollars per share)	0.96	0.85
DIVIDENDS DECLARED PER COMMON SHARE:
Dividend declared per common share (in dollars per share)	0.209	0.198
Class B Common Stock
BASIC EARNINGS PER SHARE:
Basic earnings per share (in dollars per share)	0.88	0.78
DILUTED EARNINGS PER SHARE:
Diluted earnings per share (in dollars per share)	0.88	0.77
DIVIDENDS DECLARED PER COMMON SHARE:
Dividend declared per common share (in dollars per share)	$ 0.190	$ 0.180