Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Operating Activities
Net income	$ 213,289	$ 51,558
Adjustments reconciling net income to net cash provided by (used in) operating activities:
Depreciation	8,226	7,923
Net losses on sale or disposal of premises and equipment	920	8
Net write-downs on other assets	149	1,090
Provision for credit losses	(28,449)	129,208
Net write-downs and (gains) losses on sale of other real estate owned	(558)	873
Share-based compensation expense	3,454	1,700
Amortization of intangible assets	8,191	11,232
Amortization of operating lease right of use assets	5,866	6,599
Provision for deferred taxes	26,488	(32,544)
Net amortization of investment securities available-for-sale	1,985	2,932
Net amortization of investment securities held-to-maturity	1	0
Net (gain) loss on securities	11	(5)
Accretion of discount on purchased loans, net	(10,589)	(16,138)
Net amortization on other borrowings	222	94
Amortization of subordinated deferrable interest debentures	986	970
Loan servicing asset impairment (recovery)	(11,388)	30,239
Originations of mortgage loans held for sale	(4,425,420)	(3,799,622)
Payments received on mortgage loans held for sale	24,477	34,849
Proceeds from sales of mortgage loans held for sale	4,198,098	3,724,287
Net gains on mortgage loans held for sale	(84,992)	(129,450)
Originations of SBA loans	(44,257)	(28,595)
Proceeds from sales of SBA loans	41,017	35,152
Net gains on sale of SBA loans	(3,453)	(2,614)
Increase in cash surrender value of bank owned life insurance	(2,078)	(1,876)
Gain on bank owned life insurance proceeds	(603)	(845)
Net gains on other loans held for sale	(457)	0
Changes in FDIC loss-share payable, net of cash payments	0	(562)
Change attributable to other operating activities	(13,363)	(52,715)
Net cash used in operating activities	(92,227)	(26,252)
Investing Activities, net of effects of business combinations
Proceeds from maturities of time deposits in other banks	249	0
Purchases of investment securities held-to-maturity	(29,056)	0
Proceeds from prepayments and maturities of securities available-for-sale	192,022	188,920
Net (increase) decrease in other investments	570	(9,529)
Net increase in loans	(219,110)	(1,591,894)
Purchases of premises and equipment	(17,196)	(9,267)
Proceeds from sale of premises and equipment	946	409
Proceeds from sales of other real estate owned	7,902	3,169
Payments paid to FDIC under loss-share agreements	0	(177)
Purchases of bank owned life insurance	(100,000)	0
Proceeds from bank owned life insurance	1,309	2,980
Payments received on other loans held for sale	9,136	0
Proceeds from sales of other loans held for sale	156,803	0
Net cash and cash equivalents received from acquisitions	0	(2,417)
Net cash provided by (used in) investing activities	3,575	(1,417,806)
Financing Activities, net of effects of business combinations
Net increase in deposits	1,300,174	1,564,859
Net decrease in securities sold under agreements to repurchase	(6,097)	(7,756)
Proceeds from other borrowings	0	4,745,000
Repayment of other borrowings	(74)	(4,725,167)
Repayment of subordinated deferrable interest debentures	0	(5,155)
Proceeds from exercise of stock options	4,211	701
Dividends paid - common stock	(20,888)	(20,841)
Purchase of treasury shares	(1,456)	(7,973)
Net cash provided by financing activities	1,275,870	1,543,668
Net increase in cash and cash equivalents	1,187,218	99,610
Cash and cash equivalents at beginning of period	2,117,306	621,849
Cash and cash equivalents at end of period	3,304,524	721,459
Cash paid during the period for:
Interest	25,985	60,725
Income taxes	30,924	7,934
Loans transferred to other real estate owned	1,239	8,165
Loans transferred from loans held for sale to loans held for investment	85,748	86,557
Loans provided for the sales of other real estate owned	1,052	299
Right-of-use assets obtained in exchange for new operating lease liabilities	2,932	8,844
Change in unrealized gain (loss) on securities available-for-sale, net of tax	(8,481)	21,603
Change in unrealized gain (loss) on cash flow hedge, net of tax	$ 0	$ 14