CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities:
Net income	$ 28,002	$ 9,521
Adjustments to net income:
Depreciation and amortization expense	1,657	825
Provision for loan losses	2,253	2,502
Share-based compensation expense	1,712	1,154
Loss on sale and disposal of premises and equipment	0	45
Loss on sale of or write down of other real estate owned	12	0
Net amortization on securities available-for-sale, net	1,830	1,039
Net accretion of discounts/premiums for loans acquired and deferred loan fees/costs	(1,323)	(249)
Gain on sale of investment securities available-for-sale	(6)	0
Originations of loans held for sale	(29,229)	(35,149)
Proceeds from the sales of and principal payments from loans held for sale	38,814	33,037
Gain on sale of loans	(2,958)	(2,811)
Deferred income tax expense	3,183	3,350
Change in accrued expenses and other liabilities, net	(11,305)	(8,178)
Income from bank owned life insurance, net	(478)	(287)
Amortization of core deposit intangible	2,274	511
Change in accrued interest receivable and other assets, net	1,089	2,714
Net cash provided by operating activities	35,527	8,024
Cash flows from investing activities:
Proceeds from sale of real estate owned	108	0
Increase in loans, net	(44,508)	(144,347)
Principal payments on securities available-for-sale	21,846	10,535
Purchase of securities available-for-sale	(123,774)	(65,771)
Proceeds from sale or maturity of securities available-for-sale	(184)	1,770
Proceeds from the sale of premises and equipment	5,000	0
Purchases of premises and equipment	(1,647)	(655)
Change in FHLB, FRB, and other stock, at cost	(16,234)	(507)
Change in cash acquired in acquisitions, net	(456)	0
Net cash used in investing activities	(159,849)	(198,975)
Cash flows from financing activities:
Net increase in deposit accounts	106,405	151,588
Net change in short-term borrowings	(42,279)	(16,608)
Repayment of long-term borrowings	(10,418)	30
Proceeds from exercise of stock options and warrants	1,084	501
Repurchase of common stock	(1,538)	(904)
Net cash provided by financing activities	53,254	134,607
Net decrease in cash and cash equivalents	(71,068)	(56,344)
Cash and cash equivalents, beginning of period	200,064	156,857
Cash and cash equivalents, end of period	128,996	100,513
Supplemental cash flow disclosures:
Interest paid	9,974	4,565
Income taxes paid	$ 95	$ 36