CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Statement of Cash Flows [Abstract]
Net income	$ 18,923	$ 9,613
Adjustments to net income:
Depreciation and amortization expense	1,348	1,244
Provision for loan losses	2,709	3,663
Share-based compensation expense	1,048	435
Loss on sale of or write down of other real estate owned	(18)	92
Net amortization on securities held for sale, net	7,080	1,763
Net accretion of discounts/premiums for loans acquired and deferred loan fees/costs	(6,713)	(967)
Gain on sale of investment securities available for sale	(1,285)	(255)
Originations of loans held for sale	(44,463)	0
Proceeds from the sales of and principal payments from loans held for sale	47,487	0
Gain on sale of loans	(4,030)	(2,721)
Deferred income tax benefit	(977)	1,706
Change in accrued expenses and other liabilities, net	(1,700)	(1,840)
Income from bank owned life insurance, net	(579)	(643)
Amortization of core deposit intangible	989	0
Change in accrued interest receivable and other assets, net	5,904	(5,159)
Net cash provided by operating activities	25,723	6,931
Cash flows from investing activities:
Increase in loans, net	(204,505)	(154,121)
Change in other real estate owned from sales and writedowns	468	234
Principal payments on securities available for sale	18,234	15,907
Purchase of securities available for sale	(5,135)	(60,132)
Proceeds from sale or maturity of securities available for sale	211,303	16,070
Proceeds from the sale of premises and equipment	6,987	(842)
Purchases of premises and equipment	(5,745)	0
Change in FHLB, FRB, and other stock, at cost	(4,692)	(3,407)
Cash acquired in acquisitions	40,303	2,961
Net cash provided by (used in) investing activities	57,218	(183,330)
Cash flows from financing activities:
Net increase in deposit accounts	99,286	129,139
Change in FHLB advances and other borrowings, net	(75,873)	17,446
Proceeds from issuance of common stock, net of issuance cost	0	1,323
Proceeds from exercise of stock options and warrants	528	48
Warrants exercised	0	688
Repurchase of common stock	0	(93)
Net cash provided by financing activities	23,941	148,551
Net increase (decrease) in cash and cash equivalents	106,882	(27,848)
Cash and cash equivalents, beginning of year	78,417	110,925
Cash and cash equivalents, end of year	185,299	83,077
Supplemental cash flow disclosures:
Interest paid	6,586	5,979
Income taxes paid	12,958	7,450
Assets acquired (liabilities assumed and capital created) in acquisitions (See Note 4):
Investment securities	190,254	53,752
FHLB and Other Stock	3,671	2,369
Loans	456,158	332,893
Core deposit intangible	4,319	2,903
Deferred income tax	7,069	4,794
Bank owned life insurance	0	11,276
Goodwill	51,106	27,882
Fixed assets	4,502	2,134
Other assets	5,610	2,402
Deposits	(636,591)	(336,018)
Other borrowings	0	(33,300)
Other liabilities	(8,843)	(1,796)
Common stock and additional paid-in capital	$ (119,383)	$ (70,929)