CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash flows from operating activities:
Net income	$ 1,102,641,000	$ 934,889,000	$ 506,622,000
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses (benefit)	83,030,000	(193,464,000)	292,536,000
Goodwill impairment losses	9,000,000	0	0
Amortization of intangibles	3,275,000	9,134,000	6,397,000
Depreciation and amortization of premises and equipment	55,107,000	55,104,000	58,452,000
Net accretion of discounts and amortization of premiums and deferred fees	29,120,000	(21,962,000)	(63,300,000)
Interest capitalized on loans subject to the temporary payment moratorium or loss mitigation alternatives	(11,521,000)	(15,567,000)	(95,212,000)
Share-based compensation	16,727,000	17,774,000	8,254,000
Impairment losses on right-of-use and long-lived assets	2,233,000	5,320,000	18,004,000
Fair value adjustments on mortgage servicing rights	(166,000)	10,206,000	42,055,000
Fair value adjustment for contingent consideration	(9,241,000)	0	0
Adjustments to indemnity reserves on loans sold	(919,000)	(4,406,000)	(390,000)
Earnings from investments under the equity method, net of dividends or distributions	(29,522,000)	(50,942,000)	(27,738,000)
Deferred income tax (benefit) expense	(33,129,000)	229,371,000	75,044,000
(Gain) loss on:
Disposition of premises and equipment and other productive assets	(9,453,000)	(18,393,000)	(11,561,000)
Proceeds from insurance claims	0	0	(366,000)
Sale of debt securities	0	(23,000)	(41,000)
Sale of loans, including valuation adjustments on loans held-for-sale and mortgage banking activities	252,000	(21,611,000)	(32,449,000)
Sale of equity method investment	(8,198,000)	0	0
Disposition of stock as part of the Evertec Transactions	(240,412,000)	0	0
Sale of foreclosed assets, including write-downs	(33,008,000)	(30,098,000)	(19,958,000)
Acquisitions of loans held-for-sale	(122,363,000)	(251,336,000)	(227,697,000)
Proceeds from sale of loans held-for-sale	64,542,000	95,100,000	83,456,000
Net originations on loans held-for-sale	(202,913,000)	(527,585,000)	(391,537,000)
Net decrease (increase) in:
Trading debt securities	353,301,000	741,465,000	493,993,000
Equity securities	54,000	(2,336,000)	(8,263,000)
Accrued income receivable	(62,932,000)	6,193,000	(35,616,000)
Other assets	76,589,000	25,022,000	114,329,000
Net decrease in:
Interest payable	6,061,000	(5,395,000)	(5,404,000)
Pension and other postretirement benefits obligation	(2,893,000)	(4,104,000)	5,898,000
Other liabilities	(20,724,000)	22,802,000	(106,736,000)
Total adjustments	(88,103,000)	70,269,000	172,150,000
Net cash provided by operating activities	1,014,538,000	1,005,158,000	678,772,000
Cash flows from investing activities:
Net decrease (increase) in money market investments	11,922,703,000	(5,895,789,000)	(8,378,577,000)
Purchases of investment securities:
Available-for-sale	(22,232,278,000)	(14,672,856,000)	(21,033,807,000)
Held-to-maturity	(1,879,443,000)	0	0
Equity	(48,921,000)	(16,196,000)	(30,794,000)
Proceeds from calls, paydowns, maturities and redemptions of investment securities:
Available-for-sale	20,143,921,000	9,602,430,000	18,224,362,000
Held-to-maturity	9,826,000	15,700,000	6,733,000
Proceeds from sale of investment securities:
Available-for-sale	0	235,992,000	5,103,000
Equity	42,990,000	2,904,000	25,206,000
Net (disbursements) repayments on loans	(2,237,084,000)	469,268,000	(875,941,000)
Proceeds from sale of loans	141,314,000	203,179,000	84,385,000
Acquisition of loan portfolios	(753,684,000)	(348,179,000)	(1,138,276,000)
Payments to acquire other intangible	0	(905,000)	(83,000)
Payments to acquire businesses, net of cash acquired	0	(155,828,000)	0
Return of capital from equity method investments	681,000	6,362,000	959,000
Payments to acquire equity method investments	(1,625,000)	(375,000)	(1,778,000)
Acquisition of premises and equipment	(103,789,000)	(72,781,000)	(60,073,000)
Proceeds from insurance claims	0	0	366,000
Proceeds from sale of:
Premises and equipment and other productive assets	10,305,000	21,482,000	26,548,000
Foreclosed assets	107,203,000	86,942,000	77,521,000
Net cash provided by (used in) investing activities	5,350,200,000	(10,518,650,000)	(13,068,146,000)
Net (decrease) increase in:
Deposits	(5,770,261,000)	10,138,617,000	13,102,028,000
Assets sold under agreements to repurchase	57,006,000	(29,700,000)	(72,076,000)
Other short-term borrowings	290,000,000	75,000,000	0
Payment of notes payable	(103,147,000)	(237,713,000)	(139,920,000)
Principal payments of finance leases	(3,346,000)	(2,852,000)	(3,145,000)
Proceeds from issuance of notes payable	0	0	261,999,000
Proceeds from issuance of common stock	5,837,000	4,674,000	9,093,000
Payments for repurchase of redeemable preferred stock	0	0	(28,017,000)
Dividends paid	(161,516,000)	(141,466,000)	(133,645,000)
Net payments for repurchase of common stock	(631,893,000)	(350,535,000)	(500,479,000)
Payments related to tax witholding for share-based compensation	(5,771,000)	(5,115,000)	(3,693,000)
Net cash (used in) provided by financing activities	(6,323,091,000)	9,450,910,000	12,492,145,000
Net increase (decrease) in cash and due from banks, and restricted cash	41,647,000	(62,582,000)	102,771,000
Cash and due from banks and restricted cash at beginning of period	434,512,000	497,094,000	394,323,000
Cash and due from banks and restricted cash at end of period	476,159,000	434,512,000	497,094,000
Other equity method investees
Proceeds from sale of investment securities:
Proceeds from sale of equity method investments / Evertec stock sale	8,198,000	0	0
EVERTEC Assets
Proceeds from sale of investment securities:
Proceeds from sale of equity method investments / Evertec stock sale	$ 219,883,000	$ 0	$ 0