CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash Flows from Operating Activities
Net income	$ 45,958	$ 34,991
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	3,308	3,134
Amortization of premiums and discounts on securities, net	1,223	1,732
Amortization of operating lease right-of-use assets	2,041	0
Other amortization and accretion, net	(1,632)	225
Stock based compensation	4,027	3,622
Origination of loans designated for sale	(139,219)	(159,991)
Sale of loans designated for sale	138,961	173,385
Provision for loan losses	3,948	3,614
Deferred income taxes	3,736	4,559
Losses on sale of securities	643	0
Gains on sale of loans	(3,980)	(5,277)
(Gains) losses on sale and write-downs of other real estate owned	(408)	298
Losses on disposition of fixed assets	464	231
Changes in operating assets and liabilities, net of effects from acquired companies:
Net increase in other assets	(21)	(2,103)
Net (decrease) increase in other liabilities	(9,623)	3,184
Net cash provided by operating activities	49,426	61,604
Cash Flows from Investing Activities
Maturities and repayments of debt securities available for sale	41,564	77,860
Maturities and repayments of debt securities held to maturity	16,935	34,360
Proceeds from sale of debt securities available for sale	73,297	0
Purchases of debt securities available for sale	(87,433)	(101,354)
Maturities of time deposits with other banks	3,263	1,991
Net new loans and principal repayments	(12,017)	(161,038)
Purchases of loans held for investment	(50,562)	0
Proceeds from sale of other real estate owned	2,722	5,184
Proceeds from sale of FHLB and Federal Reserve Bank Stock	29,070	20,570
Purchase of FHLB and Federal Reserve Bank Stock	(22,648)	(23,055)
Proceeds from sale of Visa Class B Stock	0	21,333
Redemption of bank owned life insurance	12,378	4,232
Additions to bank premises and equipment	(1,485)	(2,475)
Net cash provided by (used in) investing activities	5,084	(122,392)
Cash Flows from Financing Activities
Net increase in deposits	363,969	104,720
Net decrease in federal funds purchased and repurchase agreements	(132,308)	(16,044)
Net decrease in FHLB borrowings with original maturities of three months or less	(177,000)	(66,000)
Repayments of FHLB borrowings with original maturities of more than three months	(63,000)	0
Proceeds from FHLB borrowings with original maturities of more than three months	0	60,000
Stock based employee benefit plans	(2,343)	129
Dividends paid	0	0
Net cash (used in) provided by financing activities	(10,682)	82,805
Net increase in cash and cash equivalents	43,828	22,017
Cash and cash equivalents at beginning of period	115,951	109,504
Cash and cash equivalents at end of period	159,779	131,521
Supplemental disclosure of cash flow information:
Cash paid during the period for interest	23,200	11,919
Cash paid during the period for taxes	6,000	6,200
Initial recognition of operating lease right-of-use assets	29,077	0
Initial recognition of operating lease liabilities	33,403	0
Supplemental disclosure of non cash investing activities:
Transfer of debt securities from held to maturity to available for sale	52,796	0
Transfers from loans to other real estate owned	555	4,207
Transfers from bank premises to other real estate owned	$ 0	$ 2,052