CONSOLIDATED STATEMENTS OF CASH FLOWS $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
CASH FLOWS FROM OPERATING ACTIVITIES
NET INCOME	$ 40,103	$ 25,515	$ 16,616
Adjustments to net income:
Depreciation and amortization expense	2,854	2,432	2,198
Provision for loan losses	8,776	6,425	4,684
Share-based compensation expense	2,729	1,165	514
Loss on sale and disposal of premises and equipment	656	0	23
Loss on sale of or write down of other real estate owned	321	92	17
Net amortization on securities available-for-sale	9,157	3,822	2,641
Net accretion of discounts/premiums for loans acquired and deferred loan fees/costs	1,832	(2,967)	(2,179)
Gain on sale of investment securities available-for-sale	(1,797)	(290)	(1,547)
Other-than-temporary impairment recovery on investment securities, net	(205)	0	(29)
Originations of loans held for sale	(103,883)	(87,900)	0
Proceeds from the sales of and principal payments from loans held for sale	115,877	86,604	31
Gain on sale of loans	(9,539)	(7,970)	(6,120)
Deferred income tax benefit	3,887	(1,395)	(2,375)
Change in accrued expenses and other liabilities, net	(4,428)	6,786	2,764
Income from bank owned life insurance, net	(1,164)	(1,147)	(771)
Amortization of core deposit intangible	2,039	1,350	1,014
Change in accrued interest receivable and other assets, net	(3,768)	(8,853)	(4,293)
Net cash provided by (used in) operating activities	63,447	23,669	13,188
Cash flows from investing activities:
Net increase in interest-bearing time deposits with financial institutions	0	(1,972)	0
Increase in loans, net	(263,075)	(247,000)	(226,345)
Purchase of loans held for investment	(271,159)	(43,440)	(73,055)
Change in other real estate owned from sales and write-downs	380	(216)	777
Purchase of held-to-maturity securities	0	(9,642)	0
Principal payments on securities available-for-sale	38,935	33,751	26,815
Purchase of securities available-for-sale	(190,140)	(90,127)	(133,689)
Proceeds from sale of securities available-for-sale	223,365	22,032	163,241
Proceeds from maturity of securities available-for-sale	7,580	5,610	3,100
Proceeds from the sale of premises and equipment	10,049	1,506	0
Investment in bank owned life insurance	0	0	(2,000)
Purchases of premises and equipment	(11,970)	(1,887)	(1,448)
Change in FHLB, FRB, and other stock, at cost	(15,012)	(2,856)	(1,617)
Cash acquired (paid) in acquisitions	40,132	2,961	(7,793)
Net cash used in investing activities	(430,915)	(331,280)	(252,014)
Cash flows from financing activities:
Net increase in deposit accounts	313,770	228,279	324,540
Proceeds from issuance of subordinated debt	0	0	58,834
Change in FHLB advances and other borrowings, net	130,919	46,182	(155,065)
Proceeds from exercise of stock options and warrants	1,345	758	267
Repurchase of common stock	(126)	(116)	(5,638)
Net cash provided financing activities	445,908	275,103	222,938
Net increase (decrease) in cash and cash equivalents	78,440	(32,508)	(15,888)
Cash and cash equivalents, beginning of year	78,417	110,925	126,813
Cash and cash equivalents, end of year	156,857	78,417	110,925
Supplemental cash flow disclosures:
Interest paid	13,564	12,081	6,500
Income taxes paid	13,139	12,127	14,700
Assets acquired (liabilities assumed) in acquisitions (See Note 23):
Investment securities	186,583	53,752	0
FHLB, FRB and other stock	3,671	2,369	0
Loans	456,158	332,893	78,833
Core deposit intangible	4,319	2,903	0
Deferred income tax	6,748	4,794	0
Bank owned life insurance	0	11,276	0
Goodwill	51,658	27,882	5,522
Fixed assets	4,190	2,134	74
Other assets	9,362	2,402	702
Deposits	(636,591)	(336,018)	0
Other borrowings	0	(33,300)	(67,617)
Other liabilities	(8,843)	(1,796)	(709)
NONCASH INVESTING ACTIVITIES DURING THE PERIOD
Transfers from loans to other real estate owned	197	450	645
Loans held for sale transfer to loans held for investment	$ 0	$ 0	$ 2,936