CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Interest income:
Loans	$ 581,080	$ 483,327	$ 1,732,206	$ 1,387,411
Investments	13,268	10,260	36,636	24,252
Cash and cash equivalents	57,902	26,324	154,911	36,317
Total interest income	652,250	519,911	1,923,753	1,447,980
Interest expense:
Deposits	209,921	105,468	584,859	215,473
Interest expense on short-term borrowings	3,576	3,054	9,893	8,902
Interest expense on long-term borrowings	54,125	41,879	152,674	116,255
Total interest expense	267,622	150,401	747,426	340,630
Net interest income	384,628	369,510	1,176,327	1,107,350
Less: provisions for credit losses	198,023	207,598	329,864	336,193
Net interest income after provisions for credit losses	186,605	161,912	846,463	771,157
Non-interest income:
Gains (losses) on sales of loans, net	(5)	74,978	124,740	324,856
Gains (losses) on securities, net	1,490	891	1,988	(2,021)
Gains (losses) on derivatives and hedging activities, net	0	0	0	(5)
Other income	22,753	19,234	63,275	52,451
Total non-interest income	24,238	95,103	190,003	375,281
Operating expenses:
Compensation and benefits	83,577	65,003	249,459	202,995
FDIC assessment fees	12,283	4,592	33,663	11,501
Other operating expenses	71,542	80,369	192,983	199,204
Total operating expenses	167,402	149,964	476,105	413,700
Acquired intangible assets amortization expense	2,834	2,328	7,351	5,478
Total non-interest expenses	170,236	152,292	483,456	419,178
Income before income tax expense	40,607	104,723	553,010	727,260
Income tax expense	11,242	29,551	140,062	181,203
Net income	29,365	75,172	412,948	546,057
Preferred stock dividends	4,642	2,531	12,979	5,563
Net income attributable to SLM Corporation common stock	$ 24,723	$ 72,641	$ 399,969	$ 540,494
Basic earnings per common share (in dollars per share)	$ 0.11	$ 0.29	$ 1.71	$ 2.05
Average common shares outstanding (in shares)	226,120	251,266	234,170	263,098
Diluted earnings per common share (in dollars per share)	$ 0.11	$ 0.29	$ 1.69	$ 2.03
Average common and common equivalent shares outstanding (in shares)	228,800	253,716	236,593	266,065
Declared dividends per common share (in dollars per share)	$ 0.11	$ 0.11	$ 0.33	$ 0.33