CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Interest income:
Loans	$ 568,342	$ 446,040	$ 1,151,126	$ 904,084
Investments	12,037	8,513	23,368	13,992
Cash and cash equivalents	53,526	8,478	97,009	9,993
Total interest income	633,905	463,031	1,271,503	928,069
Interest expense:
Deposits	191,407	60,468	374,938	110,005
Interest expense on short-term borrowings	3,299	2,973	6,317	5,848
Interest expense on long-term borrowings	52,568	36,782	98,549	74,376
Total interest expense	247,274	100,223	479,804	190,229
Net interest income	386,631	362,808	791,699	737,840
Less: provisions for credit losses	17,729	30,545	131,841	128,595
Net interest income after provisions for credit losses	368,902	332,263	659,858	609,245
Non-interest income:
Gains on sales of loans, net	124,754	239,997	124,745	249,878
Gains (losses) on securities, net	(1,213)	667	498	(2,913)
Gains (losses) on derivatives and hedging activities, net	0	0	0	(5)
Other income	20,513	17,589	40,522	33,218
Total non-interest income	144,054	258,253	165,765	280,178
Operating expenses:
Compensation and benefits	78,233	66,011	165,882	137,992
FDIC assessment fees	9,851	1,225	21,380	6,909
Other operating expenses	66,080	64,494	121,441	118,835
Total operating expenses	154,164	131,730	308,703	263,736
Acquired intangible assets amortization expense	2,245	2,417	4,517	3,150
Total non-interest expenses	156,409	134,147	313,220	266,886
Income before income tax expense	356,547	456,369	512,403	622,537
Income tax expense	91,482	114,296	128,820	151,652
Net income	265,065	342,073	383,583	470,885
Preferred stock dividends	4,274	1,757	8,337	3,032
Net income attributable to SLM Corporation common stock	$ 260,791	$ 340,316	$ 375,246	$ 467,853
Basic earnings per common share (in dollars per share)	$ 1.11	$ 1.30	$ 1.57	$ 1.74
Average common shares outstanding (in shares)	235,061	261,333	238,261	269,112
Diluted earnings per common share (in dollars per share)	$ 1.10	$ 1.29	$ 1.56	$ 1.72
Average common and common equivalent shares outstanding (in shares)	237,592	264,122	240,554	272,343
Declared dividends per common share (in dollars per share)	$ 0.11	$ 0.11	$ 0.22	$ 0.22