CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
OPERATING ACTIVITIES
Net income	$ 72,100	$ 40,847	$ 38,723
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	9,519	8,058	6,642
Net (gains) losses on sale or disposal of premises and equipment	992	184	(516)
Provision for loan losses	4,091	5,264	5,648
Net write-downs and losses on sale of other real estate owned	1,953	15,696	4,950
Stock based compensation expense	2,261	1,485	2,057
Amortization of intangible assets	4,376	3,741	2,330
Provision for deferred taxes	847	(344)	6,516
Net amortization of investment securities available for sale	7,057	5,881	3,666
Net gains on securities available for sale	(94)	(137)	(138)
Accretion of discount on purchased non-covered loans	(13,284)	(10,590)	(9,745)
Amortization of premium on non-covered loan pools	5,653	1,165	0
Accretion of discount on covered loans	(3,353)	(9,658)	(22,188)
Net accretion of other borrowings	(76)	0	401
Amortization of subordinated deferrable interest debentures	1,453	1,043	807
Originations of mortgage loans held for sale	(1,403,954)	(1,038,691)	(687,090)
Payments received on mortgage loans held for sale	1,390	1,331	1,299
Proceeds from sales of mortgage loans held for sale	1,340,668	989,979	694,130
Net gains on mortgage loans held for sale	(52,198)	(40,389)	(28,532)
Originations of SBA loans	(69,512)	(54,594)	(58,089)
Proceeds from sales of SBA loans	28,268	39,484	32,782
Net gains on sales of SBA loans	(3,974)	(4,522)	(3,896)
Increase in cash surrender value of BOLI	(1,734)	(1,384)	(1,623)
Changes in FDIC loss-share receivable/payable, net of cash payments received	11,798	5,777	11,596
Decrease (increase) decrease in interest receivable	(1,004)	(4,251)	(1,952)
Increase (decrease) in interest payable	446	(327)	(49)
Increase (decrease) in taxes payable	(8,328)	9,033	(7,221)
Change attributable to other operating activities	(5,128)	10,696	3,896
Net cash provided by (used in) operating activities	(69,767)	(25,223)	(5,596)
INVESTING ACTIVITIES, net of effects of business combinations
Purchases of securities available for sale	(200,823)	(249,115)	(126,909)
Proceeds from maturities of securities available for sale	131,390	89,030	51,215
Proceeds from sale of securities available for sale	75,990	72,528	94,051
Net decrease (increase) in other investments	(17,936)	1,824	8,028
Net increase in loans, excluding purchased non-covered and covered loans	(1,063,345)	(442,180)	(251,955)
Payments received on purchased non-covered loans	215,958	154,666	74,931
Purchases of non-covered loan pools	(152,091)	(622,533)	0
Payments received on non-covered loan pools	171,087	28,405	0
Payments received on covered loans	31,494	79,372	102,996
Purchases of premises and equipment	(10,977)	(12,576)	(5,709)
Proceeds from sale of premises and equipment	295	244	1,213
Proceeds from sales of other real estate owned	22,483	43,269	43,793
Purchase of bank owned life insurance	0	(4,000)	0
Payments received from FDIC under loss-sharing agreements	816	19,273	22,494
Net cash proceeds received (paid) from acquisitions	(7,206)	673,933	17,022
Net cash provided by (used in) investing activities	(802,865)	(167,860)	31,170
FINANCING ACTIVITIES, net of effects of business combinations
Net increase (decrease) in deposits	294,513	353,984	62,894
Net increase (decrease) in securities sold under agreements to repurchase	(10,080)	(9,725)	(15,634)
Proceeds from other borrowings	635,886	0	118,963
Repayment of other borrowings	(231,020)	(39,881)	(257,060)
Dividends paid - preferred stock	0	0	(286)
Redemption of preferred stock	0	0	(28,000)
Issuance of common stock	0	114,889	0
Proceeds from exercise of stock options	964	1,191	459
Dividends paid - common stock	(8,584)	(6,439)	(4,016)
Purchase of treasury shares	(1,225)	(732)	(474)
Net cash provided by (used in) financing activities	680,454	413,287	(123,154)
Net increase (decrease) in cash and due from banks	(192,178)	220,204	(97,580)
Cash and cash equivalents at beginning of period	390,563	170,359	267,939
Cash and cash equivalents at end of period	198,385	390,563	170,359
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION
Cash paid during the year for: Interest	19,248	15,183	14,667
Cash paid during the year for: Income taxes	40,575	5,828	19,281
Loans (excluding purchased non-covered and covered loans) transferred to other real estate owned	3,203	11,261	11,972
Purchased non-covered loans transferred to other real estate owned	4,419	4,473	4,160
Covered loans transferred to other real estate owned	2,810	7,910	13,650
Loans transferred from mortgage loans available for sale to loans	119,352	71,347	0
Loans provided for the sales of other real estate owned	1,942	4,826	1,109
Assets acquired in business combinations	561,440	1,169,990	448,971
Liabilities assumed in business combinations	465,048	1,099,988	411,701
Issuance of common stock in acquisitions	72,455	0	34,474
Change in unrealized gain (loss) on securities available for sale, net	(4,435)	(2,389)	7,281
Change in unrealized gain (loss) on cash flow hedge (interest rate swap), net	$ 24	$ (356)	$ (889)