Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash Flows From Operating Activities:
Net Income	$ 93,325	$ 107,487
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	40,654	10,146
Provision for unfunded commitments	974	0
Depreciation and amortization	3,515	5,653
Amortization of operating lease right-of-use assets	5,276	3,022
Gains on sale of loans	(16,249)	(5,874)
Gains on sale of GNMA loans	(2,443)	0
Securities premium amortization (discount accretion), net	5,345	3,966
Origination of loans held for sale	(862,171)	(437,525)
Proceeds from sale of loans held for sale	856,043	410,454
Net increase in cash surrender value of BOLI	(1,655)	(1,285)
Deferred income tax (benefit) expense	(6,559)	3,305
Net gain on sale of other real estate owned	(1,180)	0
Net gain on sale of investment securities	(1,650)	(1,628)
Stock-based compensation expense	3,874	6,648
Net tax benefits from stock compensation	99	10
(Increase) decrease in other assets	(45,493)	7,274
Increase (decrease) in other liabilities	35,880	(19,314)
Net cash provided by operating activities	107,585	92,339
Cash Flows From Investing Activities:
Purchases of available-for-sale investment securities	(465,119)	(130,693)
Proceeds from maturities of available-for-sale securities	208,264	129,879
Proceeds from sale/call of available-for-sale securities	130,265	82,982
Purchases of Federal Reserve and Federal Home Loan Bank stock	(9,116)	(90,219)
Proceeds from redemption of Federal Reserve and Federal Home Loan Bank stock	4,250	85,000
Net increase in loans	(343,665)	(574,177)
Increase (decrease) in premises and equipment	(445)	(2,171)
Net cash used in investing activities	(475,566)	(499,399)
Cash Flows From Financing Activities:
Increase in deposits	954,394	428,228
Decrease in customer repurchase agreements	(6,687)	(116)
Increase in short-term borrowings	50,000	100,000
Increase in long-term borrowings	50,293	0
Proceeds from exercise of equity compensation plans	0	332
Proceeds from employee stock purchase plan	564	585
Common stock repurchased	(44,168)	(33,385)
Cash dividends paid	(21,280)	(14,926)
Net cash provided by financing activities	983,116	480,718
Net Increase In Cash and Cash Equivalents	615,135	73,658
Cash and Cash Equivalents at Beginning of Period	241,973	321,864
Cash and Cash Equivalents at End of Period	857,108	395,522
Supplemental Cash Flows Information:
Interest paid	59,011	81,834
Income taxes paid	29,850	43,250
Non-Cash Investing Activities
Initial recognition of operating lease right-of-use assets	998	29,574
Transfers from loans to other real estate owned	$ 3,500	$ 93