Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Operating Activities
Net income	$ 123,056	$ 171,764
Adjustments reconciling net income to net cash provided by (used in) operating activities:
Depreciation	9,409	9,191
Net losses on sale or disposal of premises and equipment	74	39
Provision for credit losses	95,245	21,155
Net write-downs and (gains) losses on sale of other real estate owned	37	(1,758)
Share-based compensation expense	4,429	3,045
Amortization of intangible assets	9,394	10,325
Amortization of operating lease right of use assets	5,672	5,750
Provision for deferred taxes	(10,507)	10,505
Net (accretion) amortization of debt securities available-for-sale	(2,834)	588
Net (accretion) amortization of debt securities held-to-maturity	(88)	51
Net amortization of other investments	753	396
Net gain on securities	0	(221)
Accretion of discount on purchased loans, net	(464)	(627)
Net amortization on other borrowings	703	216
Amortization of subordinated deferrable interest debentures	997	997
Loan servicing asset recovery	0	(20,492)
Originations of mortgage loans held for sale	(1,839,990)	(2,406,310)
Payments received on mortgage loans held for sale	8,629	19,746
Proceeds from sales of mortgage loans held for sale	1,826,177	2,833,622
Net (gains) losses on sale of mortgage loans held for sale	(819)	78,173
Originations of SBA loans	(22,506)	(30,793)
Proceeds from sales of SBA loans	24,972	40,286
Net gains on sale of SBA loans	(1,231)	(3,484)
Increase in cash surrender value of bank owned life insurance	(4,482)	(3,716)
Gain on bank owned life insurance proceeds	(486)	0
Gain on debt redemption	(1,027)	0
Change attributable to other operating activities	(949)	(24,580)
Net cash provided by operating activities	224,164	713,868
Investing Activities, net of effects of business combinations
Purchases of debt securities available-for-sale	0	(613,715)
Purchases of debt securities held-to-maturity	(8,543)	(33,217)
Proceeds from maturities and paydowns of debt securities available-for-sale	37,021	117,664
Proceeds from maturities and paydowns of debt securities held-to-maturity	982	1,362
Net (increase) decrease in other investments	583	(2,123)
Net increase in loans	(653,613)	(1,533,706)
Purchases of premises and equipment	(7,881)	(8,192)
Proceeds from sale of premises and equipment	19	46
Proceeds from sales of other real estate owned	1,955	4,962
Purchases of bank owned life insurance	0	(50,000)
Proceeds from bank owned life insurance	1,890	0
Net cash and cash equivalents paid in acquisitions	0	(14,003)
Net cash used in investing activities	(627,587)	(2,130,922)
Financing Activities, net of effects of business combinations
Net increase in deposits	980,387	19,429
Net decrease in securities sold under agreements to repurchase	0	(4,892)
Proceeds from other borrowings	10,625,000	0
Repayment of other borrowings	(10,963,423)	(314,503)
Proceeds from exercise of stock options	476	2,324
Dividends paid - common stock	(20,971)	(20,843)
Purchase of treasury shares	(17,048)	(22,282)
Net cash provided by (used in) financing activities	604,421	(340,767)
Net increase (decrease) in cash, cash equivalents and restricted cash	200,998	(1,757,821)
Cash, cash equivalents and restricted cash at beginning of period	1,118,132	4,064,657
Cash, cash equivalents and restricted cash at end of period	1,319,130	2,306,836
Cash paid (received) during the period for:
Interest	182,077	23,472
Income taxes	62,186	51,851
Loans transferred to other real estate owned	7,319	229
Loans transferred from loans held for sale to loans held for investment	5,374	167,727
Loans provided for the sales of other real estate owned	0	2,288
Right-of-use assets obtained in exchange for new operating lease liabilities	2,022	1,537
Assets acquired in business acquisitions	0	10,734
Liabilities assumed in business acquisitions	0	(3,269)
Change in unrealized loss on securities available-for-sale, net of tax	$ (4,111)	$ (28,225)