CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities:
Net income	$ 43,929	$ 28,152
Adjustments to net income:
Depreciation and amortization expense	3,378	2,107
Provision for loan losses	6,455	6,722
Share-based compensation expense	4,246	1,831
(Gain) loss on sale and disposal of premises and equipment	235	420
Gain on sale of or write down of other real estate owned	(94)	(18)
Net amortization on securities available-for-sale, net	5,693	8,060
Net accretion of discounts/premiums for loans acquired and deferred loan fees/costs	1,373	(8,832)
Gain on sale of investment securities available-for-sale	(2,989)	(1,797)
Other-than-temporary impairment recovery on investment securities, net	(1)	0
Originations of loans held for sale	(130,040)	(76,570)
Proceeds from the sales of and principal payments from loans held for sale	100,938	83,317
Gain on sale of loans	(9,137)	(7,152)
Deferred income tax expense (benefit)	1,651	(1,756)
Change in accrued expenses and other liabilities, net	9,930	1,388
Income from bank owned life insurance, net	(1,349)	(871)
Amortization of core deposit intangible	4,033	1,513
Change in accrued interest receivable and other assets, net	1,665	3,272
Net cash provided by operating activities	39,916	39,786
Cash flows from investing activities:
Net increase in interest-bearing time deposits with financial institutions	(493)	0
Proceeds from sale of real estate owned	182	0
Increase in loans, net	(404,768)	(370,196)
Change in other real estate owned from sales and write-downs	0	468
Principal payments on securities available-for-sale	55,473	27,434
Purchase of securities available-for-sale	(168,697)	(102,010)
Proceeds from sale or maturity of securities available-for-sale	248,043	229,855
Proceeds from the sale of premises and equipment	0	10,263
Proceeds from bank owned life insurance death benefit	199	0
Purchases of premises and equipment	(2,421)	(10,499)
Change in FHLB, FRB, and other stock, at cost	(11,301)	(7,674)
Cash acquired in acquisitions, net	76,531	40,304
Net cash used in investing activities	(207,252)	(182,055)
Cash flows from financing activities:
Net increase in deposit accounts	203,119	228,037
Change in FHLB advances and other borrowings, net	(74,344)	(60,869)
Proceeds from exercise of stock options and warrants	4,325	588
Repurchase of common stock	(1,259)	0
Net cash provided by financing activities	131,841	167,756
Net increase in cash and cash equivalents	(35,495)	25,487
Cash and cash equivalents, beginning of period	156,857	78,417
Cash and cash equivalents, end of period	121,362	103,904
Supplemental cash flow disclosures:
Interest paid	12,696	10,956
Income taxes paid	1,405	13,139
Noncash investing activities during the period:
Security purchases settled in subsequent period	18,755	0
Transfers from portfolio loans to loans held for sale	31,685	0
Assets acquired (liabilities assumed and capital created) in acquisitions (See Note 4):
Investment securities	442,923	190,254
FHLB and Other Stock	9,739	3,671
Loans	1,364,649	456,158
Core deposit intangible	28,123	4,319
Deferred income tax	9,986	6,748
Goodwill	269,187	51,658
Fixed assets	34,902	4,190
Other assets	45,475	5,691
Deposits	(1,669,550)	(636,591)
Other borrowings	139,034	0
Other liabilities	(8,061)	(8,843)
Common stock and additional paid-in capital	$ (465,482)	$ (120,174)