STOCKHOLDERS' EQUITY - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
	Jan. 21, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Jul. 22, 2024	Jul. 24, 2023	Dec. 31, 2021
Class Of Stock [Line Items]
Dividends declared per common share		$ 0.64	$ 0.56	$ 0.46
Preferred Stock Shares Authorized		50,000,000
Preferred stock, par value		$ 1.00
Treasury Stock Shares Acquired		5,985,332	14,340,453	19,619,178
Treasury Stock Shares		59,794,239	54,360,304	40,954,057			21,836,611
Legal surplus reserve rate		10.00%
Puerto Rico Banking Law Description		The Puerto Rico Banking Law provides that, when the expenditures of a Puerto Rico commercial bank are greater than receipts, the excess of the expenditures over receipts must be charged against the undistributed profits of the bank, and the balance, if any, must be charged against the legal surplus reserve, as a reduction thereof. If the legal surplus reserve is not sufficient to cover such balance in whole or in part, the outstanding amount must be charged against the capital account and the Bank cannot pay dividends until it can replenish the legal surplus reserve to an amount of at least 20% of the original capital contributed.
Legal Surplus Amount Additions		$ 30,600	$ 31,100	$ 30,900
Remaining authorization to repurchase		200,000
Legal Surplus Amount		$ 230,178	$ 199,576
Preferred Stock Shares Outstanding		0	0
Stock Issued During Period Shares Treasury Stock Reissued		566,293	997,339	516,840
Dividends paid on common stock		$ 106,000	$ 99,600	$ 88,200
Common stock per share paid		$ 0.64	$ 0.56	$ 0.46
Parent Company [Member]
Class Of Stock [Line Items]
Number Of Redeemed Preferred Stock				300,000
Trust Preferred Securities [Member] | Statutory Trust Two [Member] | Parent Company [Member]
Class Of Stock [Line Items]
Trust preferred securities repurchased		$ 97,000
Repurchased face amount		$ 100,000
Stock Repurchase Program Announced July 24, 2023 [Member]
Class Of Stock [Line Items]
Treasury Stock Shares Acquired		5,846,872	5,080,832
Common stock repurchased price per share		$ 17.10	$ 14.76
Repurchase program authorize amount						$ 225,000
Common stock repurchase value		$ 100,000	$ 75,000
Stock Repurchase Program Announced July 22, 2024 [Member]
Class Of Stock [Line Items]
Repurchase program authorize amount					$ 250,000
Subsequent Event [Member]
Class Of Stock [Line Items]
Dividends declared per common share	$ 0.18
Increase Decease Dividends Per Share Declared Percent	13.00%
Increase in dividends per share declared	$ 0.02
Subsequent Event [Member] | O2024 Q4 Dividends [Member]
Class Of Stock [Line Items]
Dividend Payable Date To Be Paid Day Month And Year	Mar. 07, 2025
Dividends Payable Date Of Record Day Month And Year	Feb. 21, 2025
Dividends Payable Date Declared Day Month And Year	Jan. 21, 2025