CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash Flows from Operating Activities
Net income	$ 71,563	$ 51,313
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	4,899	4,691
Amortization of premiums and discounts on securities, net	1,876	2,567
Amortization of operating lease right-of-use assets	3,068	0
Other amortization and accretion, net	(1,914)	185
Stock based compensation	5,773	5,603
Origination of loans designated for sale	(234,130)	(225,929)
Sale of loans designated for sale	227,711	239,316
Provision for loan losses	6,199	9,388
Deferred income taxes	4,442	5,675
Losses on sale of securities	1,538	0
Gains on sale of loans	(6,683)	(7,752)
Gains on sale and write-downs of other real estate owned	(279)	(12)
Losses on disposition of fixed assets	506	216
Bank owned life insurance death benefits	(956)	0
Changes in operating assets and liabilities, net of effects from acquired companies:
Net increase in other assets	(1,585)	(4,052)
Net (decrease) increase in other liabilities	(6,721)	3,644
Net cash provided by operating activities	75,307	84,853
Cash Flows from Investing Activities
Maturities and repayments of debt securities available for sale	67,951	107,728
Maturities and repayments of debt securities held to maturity	30,382	48,945
Proceeds from sale of debt securities available for sale	122,906	0
Purchases of debt securities available for sale	(164,451)	(104,650)
Maturities of time deposits with other banks	3,664	2,740
Net new loans and principal repayments	(48,600)	(225,570)
Purchases of loans held for investment	(117,853)	(19,541)
Proceeds from sale of other real estate owned	5,153	9,260
Proceeds from sale of FHLB and Federal Reserve Bank Stock	46,283	28,751
Purchase of FHLB and Federal Reserve Bank Stock	(36,093)	(33,681)
Proceeds from sale of Visa Class B Stock	0	21,333
Proceeds from bank owned life insurance	14,218	4,232
Additions to bank premises and equipment	(2,254)	(3,557)
Net cash used in investing activities	(78,694)	(164,010)
Cash Flows from Financing Activities
Net increase in deposits	495,901	50,790
Net decrease in federal funds purchased and repurchase agreements	(143,909)	(27,059)
Net decrease in FHLB borrowings with original maturities of three months or less	(267,000)	(10,000)
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	(2,296)	1,016
Dividends paid	0	0
Net cash provided by financing activities	19,696	74,747
Net increase (decrease) in cash and cash equivalents	16,309	(4,410)
Cash and cash equivalents at beginning of period	115,951	109,504
Cash and cash equivalents at end of period	132,260	105,094
Supplemental disclosure of cash flow information:
Cash paid during the period for interest	35,255	18,952
Cash paid during the period for taxes	13,500	9,200
New operating lease right-of-use assets	29,430	0
New operating lease liabilities	33,756	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	5,665	4,271
Transfers from bank premises to other real estate owned	$ 0	$ 2,052