CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Interest income:
Loans	$ 555,277	$ 553,479
Investments	2,517	1,421
Cash and cash equivalents	17,139	11,553
Total interest income	574,933	566,453
Interest expense:
Deposits	135,112	125,987
Interest expense on short-term borrowings	4,217	1,165
Interest expense on long-term borrowings	35,488	37,020
Total interest expense	174,817	164,172
Net interest income	400,116	402,281
Less: provisions for credit losses	61,258	63,790
Net interest income after provisions for credit losses	338,858	338,491
Non-interest income:
Gains on sales of loans, net	238,935	0
Gains on derivatives and hedging activities, net	45,672	2,763
Other income	7,487	13,378
Total non-interest income	292,094	16,141
Non-interest expenses:
Compensation and benefits	84,222	78,738
FDIC assessment fees	8,890	7,618
Other operating expenses	54,186	53,791
Total non-interest expenses	147,298	140,147
Income before income tax expense	483,654	214,485
Income tax expense	121,481	56,296
Net income	362,173	158,189
Preferred stock dividends	3,464	4,468
Net income attributable to SLM Corporation common stock	$ 358,709	$ 153,721
Basic earnings per common share attributable to SLM Corporation (in dollars per share)	$ 0.88	$ 0.35
Average common shares outstanding (in shares)	409,786,000	434,574,000
Diluted earnings per common share attributable to SLM Corporation (in dollars per share)	$ 0.87	$ 0.35
Average common and common equivalent shares outstanding (in shares)	412,755,000	438,248,000
Declared dividends per common share attributable to SLM Corporation (in dollars per share)	$ 0.03	$ 0.03