Consolidated Statements of Income and Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Interest income
Interest and fees on loans	$ 65,464	$ 54,164	$ 126,985	$ 103,355
Interest on taxable securities	5,195	4,554	9,995	9,140
Interest on nontaxable securities	401	454	817	900
Interest on deposits in other banks and federal funds sold	351	168	664	504
Total interest income	71,411	59,340	138,461	113,899
Interest expense
Interest on deposits	4,580	2,915	8,343	5,656
Interest on other borrowings	3,674	1,836	6,371	3,218
Total interest expense	8,254	4,751	14,714	8,874
Net interest income	63,157	54,589	123,747	105,025
Provision for loan losses	2,205	889	4,041	1,570
Net interest income after provision for loan losses	60,952	53,700	119,706	103,455
Noninterest income
Service charges on deposit accounts	10,616	10,436	21,179	20,351
Mortgage banking activity	13,943	14,142	25,158	24,353
Other service charges, commissions and fees	729	967	1,438	2,078
Gain on sale of securities	37	0	37	94
Other noninterest income	2,864	2,834	6,083	5,789
Total noninterest income	28,189	28,379	53,895	52,665
Noninterest expense
Salaries and employee benefits	29,132	27,531	56,926	53,718
Occupancy and equipment expense	6,146	6,371	12,023	12,071
Data processing and communications costs	7,028	6,049	13,600	12,162
Credit resolution-related expenses	599	1,764	1,532	3,563
Advertising and marketing expense	1,259	854	2,365	1,659
Amortization of intangible assets	1,013	1,319	2,049	2,339
Merger and conversion charges	0	0	402	6,359
Other noninterest expenses	10,562	8,471	19,935	16,088
Total noninterest expense	55,739	52,359	108,832	107,959
Income before income tax expense	33,402	29,720	64,769	48,161
Income tax expense	10,315	9,671	20,529	15,795
Net income	23,087	20,049	44,240	32,366
Other comprehensive income
Net unrealized holding gains arising during period on investment securities available for sale, net of tax expense of $1,487, $3,630, $1,382 and $5,641	2,760	6,742	2,566	10,476
Reclassification adjustment for gains on investment securities included in earnings, net of tax of $13, $0, $13 and $33	(24)	0	(24)	(61)
Unrealized gains (losses) on cash flow hedges arising during period, net of tax expense (benefit) of ($58), ($104), ($35) and ($435)	(106)	(193)	(63)	(808)
Other comprehensive income	2,630	6,549	2,479	9,607
Total Comprehensive income	$ 25,717	$ 26,598	$ 46,719	$ 41,973
Basic earnings per common share	$ 0.62	$ 0.58	$ 1.21	$ 0.96
Diluted earnings per common share	0.62	0.57	1.20	0.95
Dividends declared per common share	$ 0.10	$ 0.05	$ 0.20	$ 0.10
Weighted average common shares outstanding (in thousands)
Basic	37,163	34,833	36,418	33,792
Diluted	37,489	35,153	36,744	34,107