Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Operating Activities
Net income	$ 26,660	$ 21,153
Adjustments reconciling net income to net cash provided by operating activities:
Depreciation	2,274	2,341
Net losses on sale or disposal of premises and equipment including write-downs	583	295
Provision for loan losses	1,801	1,836
Net losses (gains) on sale of other real estate owned including write-downs	33	(127)
Share-based compensation expense	1,441	673
Amortization of intangible assets	934	1,036
Provision for deferred taxes	2,432	(580)
Net amortization of investment securities available for sale	1,595	1,697
Net gains on securities available for sale	(37)	0
Accretion of discount on purchased loans	(1,571)	(3,097)
Amortization of premium on purchased loan pools	511	1,148
Net accretion (amortization) on other borrowings	33	(57)
Amortization of subordinated deferrable interest debentures	331	331
Originations of mortgage loans held for sale	(358,038)	(311,813)
Payments received on mortgage loans held for sale	367	430
Proceeds from sales of mortgage loans held for sale	377,748	294,045
Net gains on sale of mortgage loans held for sale	(6,759)	(9,200)
Originations of SBA loans	(7,168)	(19,003)
Proceeds from sales of SBA loans	10,497	4,600
Net gains on sale of SBA loans	(918)	(1,407)
Increase in cash surrender value of bank owned life insurance	(366)	(389)
Changes in FDIC loss-share payable, net of cash payments received	785	735
Change attributable to other operating activities	(4,671)	28,606
Net cash provided by operating activities	48,497	13,253
Investing Activities
Purchases of securities available for sale	(121,865)	(40,145)
Proceeds from prepayments and maturities of securities available for sale	33,970	30,119
Proceeds from sales of securities available for sale	36,685	0
Net increase in other investments	(13,809)	(642)
Net increase in loans, excluding purchased loans	(134,063)	(117,681)
Payments received on purchased loans	43,971	63,061
Payments received on purchased loan pools	16,158	38,067
Purchases of premises and equipment	(1,133)	(1,219)
Proceeds from sales of premises and equipment	427	0
Proceeds from sales of other real estate owned	3,106	4,568
Payments paid to FDIC under loss-share agreements	(333)	(559)
Net cash proceeds paid in acquisitions	(21,421)	0
Net cash used in investing activities	(158,307)	(24,431)
Financing Activities, net of effects of business combinations
Net increase (decrease) in deposits	(179,680)	67,206
Net decrease in securities sold under agreements to repurchase	(7,368)	(13,090)
Proceeds from other borrowings	455,000	518,755
Repayment of other borrowings	(150,052)	(485,350)
Issuance of common stock	0	88,656
Proceeds from exercise of stock options	813	319
Dividends paid - common stock	(3,726)	(3,492)
Purchase of treasury shares	(960)	(1,002)
Net cash provided by financing activities	114,027	172,002
Net increase in cash and cash equivalents	4,217	160,824
Cash and cash equivalents at beginning of period	330,658	198,385
Cash and cash equivalents at end of period	334,875	359,209
Cash paid during the period for:
Interest	11,602	6,348
Income taxes	2	18
Loans (excluding purchased loans) transferred to other real estate owned	1,176	1,657
Purchased loans transferred to other real estate owned	457	1,489
Loans transferred from loans held for sale to loans held for investment	73,374	45,828
Loans transferred from loans held for investment to loans held for sale	2,796	0
Loans provided for the sales of other real estate owned	0	264
Assets acquired in business acquisitions	82,981	0
Liabilities assumed in business acquisitions	5,705	0
Issuance of common stock in acquisitions	50,011	0
Issuance of common stock in exchange for equity investment in US Premium Finance Holding Company	0	5,844
Change in unrealized gain (loss) on securities available for sale, net of tax	(9,432)	(194)
Change in unrealized gain (loss) on cash flow hedge, net of tax	$ 281	$ 43