Consolidated Statements of Income and Comprehensive Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Interest income
Interest and fees on loans	$ 70,462	$ 57,322	$ 197,447	$ 160,677
Interest on taxable securities	5,062	4,336	15,057	13,476
Interest on nontaxable securities	392	397	1,209	1,297
Interest on deposits in other banks and federal funds sold	406	155	1,070	659
Total interest income	76,322	62,210	214,783	176,109
Interest expense
Interest on deposits	5,136	3,074	13,479	8,730
Interest on other borrowings	4,331	2,069	10,702	5,287
Total interest expense	9,467	5,143	24,181	14,017
Net interest income	66,855	57,067	190,602	162,092
Provision for loan losses	1,787	811	5,828	2,381
Net interest income after provision for loan losses	65,068	56,256	184,774	159,711
Noninterest income
Service charges on deposit accounts	10,535	11,358	31,714	31,709
Mortgage banking activity	13,340	14,067	38,498	38,420
Other service charges, commissions and fees	699	791	2,137	2,869
Gain on sale of securities	0	0	37	94
Other noninterest income	2,425	2,648	8,508	8,437
Total noninterest income	26,999	28,864	80,894	81,529
Noninterest expense
Salaries and employee benefits	32,583	27,982	89,509	81,700
Occupancy and equipment expense	6,036	5,989	18,059	18,060
Data processing and communications costs	7,050	6,185	20,650	18,347
Credit resolution-related expenses	1,347	1,526	2,879	5,089
Advertising and marketing expense	1,247	1,249	3,612	2,908
Amortization of intangible assets	941	993	2,990	3,332
Merger and conversion charges	92	0	494	6,359
Other noninterest expenses	14,471	9,275	34,406	25,363
Total noninterest expense	63,767	53,199	172,599	161,158
Income before income tax expense	28,300	31,921	93,069	80,082
Income tax expense	8,142	10,364	28,671	26,159
Net income	20,158	21,557	64,398	53,923
Other comprehensive income
Net unrealized holding gains (losses) arising during period on investment securities available for sale, net of tax expense (benefit) of $966, ($1,481), $2,348 and $4,160	1,795	(2,752)	4,361	7,724
Reclassification adjustment for gains on investment securities included in earnings, net of tax of $0, $0, $13 and $33	0	0	(24)	(61)
Unrealized gains (losses) on cash flow hedges arising during period, net of tax expense (benefit) of $14, $130, ($21) and ($306)	25	241	(38)	(567)
Other comprehensive income	1,820	(2,511)	4,299	7,096
Total comprehensive income	$ 21,978	$ 19,046	$ 68,697	$ 61,019
Basic earnings per common share (in dollars per share)	$ 0.54	$ 0.62	$ 1.76	$ 1.58
Diluted earnings per common share (in dollars per share)	0.54	0.61	1.74	1.56
Dividends declared per common share (in dollars per share)	$ 0.10	$ 0.10	$ 0.30	$ 0.20
Weighted average common shares outstanding (in thousands)
Basic (in shares)	37,225	34,870	36,690	34,156
Diluted (in shares)	37,553	35,195	37,017	34,470