CONSOLIDATED STATEMENTS OF NET INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
INTEREST INCOME
Loans, including fees	$ 269,811	$ 243,315	$ 212,301
Investment Securities:
Taxable	14,342	11,947	10,340
Tax-exempt	3,449	3,615	3,658
Dividends	2,224	1,765	1,475
Total Interest Income	289,826	260,642	227,774
INTEREST EXPENSE
Deposits	40,856	25,330	19,692
Borrowings and junior subordinated debt securities	14,532	9,579	4,823
Total Interest Expense	55,388	34,909	24,515
NET INTEREST INCOME	234,438	225,733	203,259
Provision for loan losses	14,995	13,883	17,965
Net Interest Income After Provision for Loan Losses	219,443	211,850	185,294
NONINTEREST INCOME
Net gain on sale of securities	0	3,000	0
Insurance	505	5,371	5,204
Mortgage banking	2,762	2,915	2,879
Gain on sale	1,873	0	0
Other	8,182	9,931	9,575
Total Noninterest Income	49,181	55,462	54,635
NONINTEREST EXPENSE
Salaries and employee benefits	76,108	80,776	77,325
Net occupancy	11,097	10,994	11,057
Data processing and information technology	10,633	8,801	8,837
Furniture, equipment and software	8,083	7,946	7,290
FDIC insurance	3,238	4,543	3,984
Other taxes	6,183	4,509	4,050
Professional services and legal	4,132	4,096	3,466
Marketing	4,192	3,659	3,713
Other	21,779	22,583	23,510
Total Noninterest Expense	145,445	147,907	143,232
Income Before Taxes	123,179	119,405	96,697
Provision for income taxes	17,845	46,437	25,305
Net Income	$ 105,334	$ 72,968	$ 71,392
Earnings per common share—basic (in USD per share)	$ 3.03	$ 2.10	$ 2.06
Earnings per common share—diluted (in USD per share)	3.01	2.09	2.05
Dividends declared per common share (in USD per share)	$ 0.99	$ 0.82	$ 0.77
Service charges on deposit accounts
NONINTEREST INCOME
Revenue from contract with customer	$ 13,096	$ 12,458	$ 12,512
Debit and credit card
NONINTEREST INCOME
Revenue from contract with customer	12,679	12,029	11,943
Wealth management
NONINTEREST INCOME
Revenue from contract with customer	10,084	9,758	10,456
Credit Card Portfolio
NONINTEREST INCOME
Gain on sale	0	0	2,066
Majority Interest of Insurance Business
NONINTEREST INCOME
Gain on sale	$ 1,873	$ 0	$ 0