Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Operating Activities
Net income	$ 21,153	$ 12,317
Adjustments reconciling net income to net cash provided by operating activities:
Depreciation	2,341	2,261
Net losses (gains) on sale or disposal of premises and equipment	295	(77)
Provision for loan losses	1,836	681	$ 4,091
Net losses (gains) on sale of other real estate owned including write-downs	(127)	1,498
Share-based compensation expense	673	492
Amortization of intangible assets	1,036	1,020
Provision for deferred taxes	(580)	(1,665)
Net amortization of investment securities available for sale	1,697	1,441
Net gains on securities available for sale	0	(94)
Accretion of discount on purchased loans	(3,097)	(4,134)
Amortization of premium on purchased loan pools	1,148	771
Net accretion of other borrowings	(57)	0
Amortization of subordinated deferrable interest debentures	331	462
Originations of mortgage loans held for sale	(311,813)	(266,587)
Payments received on mortgage loans held for sale	430	270
Proceeds from sales of mortgage loans held for sale	294,045	279,752
Net gains on sale of mortgage loans held for sale	(9,200)	(11,405)
Originations of SBA loans	(19,003)	(17,134)
Proceeds from sales of SBA loans	4,600	13,300
Net gains on sale of SBA loans	(1,407)	(1,086)
Increase in cash surrender value of BOLI	(389)	(357)
Changes in FDIC loss-share receivable/payable, net of cash payments received	735	1,805
Change attributable to other operating activities	28,606	719
Net cash provided by (used in) operating activities	13,253	14,250
Investing Activities, net of effects of business combinations
Purchase of securities available for sale	(40,145)	(56,168)
Proceeds from maturities of securities available for sale	30,119	24,666
Proceeds from sales of securities available for sale	0	41,564
Net increase in other investments	(642)	(1,274)
Net increase in loans, excluding purchased loans	(117,681)	(94,916)
Payments received on purchased loans	63,061	52,025
Purchases of loan pools	0	(90,369)
Payments received on purchased loan pools	38,067	25,827
Purchases of premises and equipment	(1,219)	(3,694)
Proceeds from sale of premises and equipment	0	131
Proceeds from sales of other real estate owned	4,568	4,497
Payments received from (paid to) FDIC under loss-share agreements	(559)	3,299
Net cash proceeds received (paid) from acquisitions	0	(7,205)
Net cash used in investing activities	(24,431)	(101,617)
Financing Activities, net of effects of business combinations
Net increase (decrease) in deposits	67,206	(49,863)
Net decrease in securities sold under agreements to repurchase	(13,090)	(19,844)
Proceeds from other borrowings	518,755	23,000
Repayment of other borrowings	(485,350)	0
Issuance of common stock	88,656	0
Proceeds from exercise of stock options	319	77
Dividends paid - common stock	(3,492)	(1,742)
Purchase of treasury shares	(1,002)	(588)
Net cash provided by (used in) financing activities	172,002	(48,960)
Net increase (decrease) in cash and cash equivalents	160,824	(136,327)
Cash and cash equivalents at beginning of period	198,385	390,563	390,563
Cash and cash equivalents at end of period	359,209	254,236	$ 198,385
Supplemental Disclosures of Cash Flow Information
Cash paid during the period for: Interest	6,348	4,059
Cash paid during the period for: Income taxes	18	804
Loans (excluding purchased loans) transferred to other real estate owned	1,657	1,044
Purchased loans transferred to other real estate owned	1,489	1,401
Loans transferred from loans held for sale to loans	45,828	23,118
Loans provided for the sales of other real estate owned	264	585
Assets acquired in business acquisitions	0	561,440
Liabilities assumed in business acquisitions	0	465,048
Issuance of common stock in acquisitions	0	72,455
Issuance of common stock in exchange for equity investment in US Premium Finance Holding Company	5,844	0
Change in unrealized gain (loss) on securities available for sale, net of tax	(194)	3,673
Change in unrealized gain (loss) on cash flow hedge (interest rate swap), net of tax	$ 43	$ (615)