Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Interest income:
Loans, including fees	$ 91,752	$ 77,254
Investment securities:
Taxable	7,231	4,793
Tax-exempt	1,430	1,016
Federal funds sold and securities purchased under agreements to resell	573	752
Total interest income	100,986	83,815
Interest expense:
Deposits	2,497	1,600
Federal funds purchased and securities sold under agreements to repurchase	240	144
Other borrowings	887	469
Total interest expense	3,624	2,213
Net interest income	97,362	81,602
Provision for loan losses	3,707	2,557
Net interest income after provision for loan losses	93,655	79,045
Noninterest income:
Fees on deposit accounts	21,719	20,125
Mortgage banking income	5,569	4,198
Trust and investment services income	5,941	4,785
Securities gains, net		122
Recoveries on acquired loans	1,532	921
Amortization of FDIC indemnification asset, net		(1,475)
Other	1,674	1,365
Total noninterest income	36,435	30,041
Noninterest expense:
Salaries and employee benefits	48,886	41,432
Net occupancy expense	6,388	5,359
Information services expense	6,360	5,034
Furniture and equipment expense	3,794	2,851
OREO expense and loan related	2,142	1,774
Bankcard expense	2,770	2,879
Amortization of intangibles	2,507	1,904
Supplies, printing and postage expense	1,654	1,808
Professional fees	1,773	1,329
FDIC assessment and other regulatory charges	1,122	1,144
Advertising and marketing	559	645
Merger and branch consolidation related expenses	21,024	958
Other	5,744	4,913
Total noninterest expense	104,723	72,030
Earnings:
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest, Total	25,367	37,056
Provision for income taxes	7,103	12,562
Net income	18,264	24,494
Net income	$ 18,264	$ 24,494
Earnings per common share:
Basic (in dollars per share)	$ 0.63	$ 1.02
Diluted (in dollars per share)	0.63	1.01
Dividends per common share (in dollars per share)	$ 0.33	$ 0.28
Weighted-average common shares outstanding:
Basic (in shares)	28,892	23,969
Diluted (in shares)	29,159	24,191