CONSOLIDATED STATEMENT OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash Flows From Operating Activities
Net Income	$ 67,275	$ 42,865	$ 29,202
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	6,353	5,614	5,076
Amortization of premiums and discounts on securities, net	3,196	3,977	7,559
Other amortization and accretion, net	(1,158)	(697)	(2,238)
Stock based compensation	7,823	5,267	4,154
Origination of loans designated for sale	(303,928)	(213,027)	(175,842)
Sale of loans designated for sale	326,328	211,091	190,843
Provision for loan losses	11,730	5,648	2,411
Deferred income taxes	459	35,827	14,206
Losses (gains) on sale of securities	485	(86)	(368)
Gain on sale of VISA Class B stock	0	(15,153)	0
Gains on sale of loans	(8,961)	(7,038)	(6,335)
Gains on sale and write-downs of other real estate owned	(107)	(711)	(509)
Losses on disposition of fixed assets	1,235	2,270	2,442
Changes in operating assets and liabilities, net of effects from acquired companies:
Net increase (decrease) in other assets	10,051	(5,506)	(11,573)
Net increase (decrease) in other liabilities	8,827	(21,432)	2,979
Net Cash Provided by Operating Activities	129,608	48,909	62,007
Cash Flows From Investing Activities
Maturities and repayments of debt securities available for sale	141,223	211,173	127,879
Maturities and repayments of debt securities held to maturity	58,315	86,460	48,705
Proceeds from sale of debt securities available for sale	31,694	235,613	40,421
Purchases of debt securities available for sale	(72,505)	(371,926)	(297,719)
Purchases of debt securities held to maturity	0	(131,439)	(218,654)
Maturities of time deposits with other banks	4,310	4,720	0
Net new loans and principal repayments	(365,816)	(328,868)	(396,862)
Proceeds from the sale of portfolio loans	0	106,815	71,433
Purchases of loans held for investment	(19,541)	(55,352)	(64,925)
Proceeds from the sale of other real estate owned	10,072	6,069	7,952
Proceeds from sale of Federal Home Loan Bank (FHLB) and Federal Reserve Bank Stock	44,731	48,295	9,350
Purchase of FHLB and Federal Reserve Bank Stock	(51,505)	(42,680)	(28,857)
Purchase of Visa Class B stock	0	(6,180)	0
Proceeds from sale of Visa Class B stock	21,333	0	0
Redemption of bank owned life insurance	4,232	3,609	0
Purchase of bank owned life insurance	0	(30,000)	(40,000)
Net cash from bank acquisitions	22,876	23,825	235,546
Additions to bank premises and equipment	(4,019)	(5,710)	(6,054)
Net Cash Used in Investing Activities	(174,600)	(245,576)	(511,785)
Cash Flows From Financing Activities
Net (decrease) increase in deposits	(39,769)	333,049	27,320
Net (decrease) increase in federal funds purchased and repurchase agreements	(1,771)	11,892	32,196
Net increase (decrease) in FHLB borrowings with original maturities of three months or less	32,000	(204,000)	415,000
Proceeds from FHLB borrowings with original maturities of more than three months	60,000	0	0
Early redemption of FHLB borrowings	0	0	(50,000)
Stock based employee benefit plans	979
Stock based employee benefit plans		(55)	(1,161)
Issuance of common stock, net of related expense	0	55,641	0
Dividends paid	0	0	0
Net Cash Provided by Financing Activities	51,439	196,527	423,355
Net increase (decrease) in cash and cash equivalents	6,447	(140)	(26,423)
Cash and cash equivalents at beginning of year	109,504	109,644	136,067
Cash and Cash Equivalents at End of Year	115,951	109,504	109,644
Supplemental disclosure of cash flow information:
Cash paid during the period for interest	28,301	15,125	7,855
Cash paid during the period for taxes	13,200	400	703
Supplemental disclosure of non cash investing activities:
Transfer from loans to other real estate owned	5,549	1,774	3,009
Transfer from bank premises to other real estate owned	9,168	1,212	7,708
Transfer from loans held for investment to loans held for sale	$ 0	$ 5,664	$ 0