CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash flows from operating activities
Net income	$ 41,490	$ 32,779
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation	1,083	366
Provision for loan losses	7,170	3,531
Accretion of acquisition discount on purchased loans	(21,259)	(18,899)
Depreciation	6,433	4,646
Amortization of core deposit intangible	4,352	2,353
Amortization of acquisition premium on time deposits	(1,353)	(2,587)
Net accretion of acquisition discount on long-term debt	264	388
Gain on mortgage loan commitments	(786)	(298)
Gain on sales of loans held for sale	(18,595)	(13,380)
Originations of loans held for sale	(384,829)	(300,605)
Proceeds from sales of loans held for sale	420,755	296,228
Increase in cash surrender value of bank-owned life insurance	(1,995)	(1,407)
Deferred income taxes	13,927	19,740
Change in deferred tax valuation allowance	(19)	0
Gain on sales of available for sale securities	(194)	(85)
Net amortization of premiums on available for sale securities	5,510	4,557
Net gain on disposal of foreclosed assets	(309)	(144)
Valuation adjustments on foreclosed assets	580	605
Change in assets and liabilities:
Decrease (increase) in accrued interest receivable	1,307	(431)
Increase in other assets	(6,123)	(12,296)
Decrease in accrued interest payable	(903)	(785)
Increase in other liabilities	420	882
Net cash provided by operating activities	66,926	15,158
Cash flows from investing activities
Purchases of investment securities available for sale	(189,408)	(129,623)
Proceeds from maturities and repayments of investment securities available for sale	182,760	67,770
Proceeds from sales of investment securities available for sale	180,616	19,169
Net loan (originations) principal collections	(155,495)	(70,109)
Net cash received in business combinations	45,143	0
Net proceeds from (purchases of) trade accounts receivables	44,781	(24,562)
Purchases of premises and equipment	(2,557)	(1,524)
Disposals of premises and equipment	2,894	1,727
Proceeds from disposal of foreclosed assets	4,707	5,784
Net redemptions (purchases) of Federal Home Loan Bank stock	4,728	(3,433)
Net cash provided by (used in) investing activities	118,169	(134,801)
Cash flows from financing activities
Net increase (decrease) in deposits	10,975	2,992
Net increase in short-term borrowings	8,886	112,500
Net decrease in long-term debt	(127,740)	(18,193)
Proceeds from exercise of stock options	2,402	120
Repurchase of preferred stock	0	(28,405)
Dividends paid on preferred stock	0	(822)
Dividends paid on common stock	(29,258)	(3,159)
Net cash provided by (used in) financing activities	(134,735)	65,033
Net change in cash and cash equivalents	50,360	(54,610)
Cash and cash equivalents, beginning of period	111,918	132,365
Cash and cash equivalents, end of period	162,278	77,755
SUPPLEMENTAL DISCLOSURES:
Interest	24,219	17,557
Income taxes	10,600	0
Noncash investing activities:
Transfers of loans to held for sale	42,347	0
Transfers of loans to foreclosed assets	13,981	5,147
Change in fair value of securities available for sale, net of tax	8,128	1,678
Change in fair value of cash flow hedge, net of tax	(3,623)	(3,562)
Acquisition:
Assets acquired (excluding goodwill)	2,778,769	0
Liabilities assumed	2,534,830	0
Purchase price	431,336	0
Goodwill recorded	$ 187,397	$ 0