Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
INTEREST INCOME
Loans	$ 159,440	$ 143,350
Interest bearing balances due from banks and federal funds sold	2,154	1,009
Investment securities	17,312	12,622
Mortgage loans held for sale	210	158
TOTAL INTEREST INCOME	179,116	157,139
INTEREST EXPENSE
Deposits	30,750	15,597
Federal funds purchased and securities sold under agreements to repurchase	136	110
Other borrowings	6,793	5,139
Subordinated notes and debentures	4,411	1,327
TOTAL INTEREST EXPENSE	42,090	22,173
NET INTEREST INCOME	137,026	134,966
Provision for loan losses	9,285	9,150
NET INTEREST INCOME AFTER PROVISION FOR LOAN LOSSES	127,741	125,816
NON-INTEREST INCOME
Investment banking income	618	834
Bank owned life insurance income	795	1,103
Gain on sale of securities, net	2,740	6
Other income	3,125	4,007
TOTAL NON-INTEREST INCOME	33,761	37,535
NON-INTEREST EXPENSE
Salaries and employee benefits	56,367	56,357
Occupancy expense, net	7,475	6,960
Furniture and equipment expense	3,358	4,403
Other real estate and foreclosure expense	637	1,020
Deposit insurance	2,040	2,128
Merger related costs	1,470	1,711
Other operating expenses	30,062	25,494
TOTAL NON-INTEREST EXPENSE	101,409	98,073
INCOME BEFORE INCOME TAXES	60,093	65,278
Provision for income taxes	12,398	13,966
NET INCOME	$ 47,695	$ 51,312
BASIC EARNINGS PER SHARE (in dollars per share)	$ 0.52	$ 0.56
DILUTED EARNINGS PER SHARE (in dollars per share)	$ 0.51	$ 0.55
Trust income
NON-INTEREST INCOME
Non-interest income	$ 5,708	$ 5,249
Service charges on deposit accounts
NON-INTEREST INCOME
Non-interest income	10,068	10,345
Other service charges and fees
NON-INTEREST INCOME
Non-interest income	1,289	2,750
Mortgage lending income
NON-INTEREST INCOME
Non-interest income	2,823	3,472
SBA lending income
NON-INTEREST INCOME
Non-interest income	497	973
Debit and credit card fees
NON-INTEREST INCOME
Non-interest income	$ 6,098	$ 8,796