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Parent Only Statements - Balance Sheets (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | --- | --- | ---
Assets |  |  |  |
Cash and cash equivalents | $ 2,559,106 | $ 1,534,339 | $ 1,918,793 |
Income taxes receivables, net | 41,570 | 0 |  |
Tax indemnification receivable | 39,207 | 168,011 |  |
Other assets | 103,695 | 84,853 |  |
Total assets | 26,638,173 | 21,779,584 |  |
Liabilities |  |  |  |
Long-Term | 4,284,304 | 3,275,270 |  |
Income taxes payable, net | 0 | 102,285 |  |
Other liabilities | 224,951 | 179,310 |  |
Total liabilities | 23,665,517 | 19,305,328 |  |
Preferred stock, par value $0.20 per share, 20 million shares authorized: |  |  |  |
Common stock, par value $0.20 per share, 1.125 billion shares authorized: 449.9 million and 443.5 million shares issued, respectively | 89,972 | 88,693 |  |
Additional paid-in capital | 1,274,635 | 1,222,277 |  |
Accumulated other comprehensive income (net of tax expense of $3,436 and $1,696, respectively) | 10,623 | 2,748 |  |
Retained earnings | 1,340,017 | 868,182 |  |
Total SLM Corporation stockholders’ equity before treasury stock | 3,115,247 | 2,581,900 |  |
Less: Common stock held in treasury at cost: 14.2 million and 11.1 million shares, respectively | (142,591) | (107,644) |  |
Total equity | 2,972,656 | 2,474,256 |  |
Total liabilities and equity | 26,638,173 | 21,779,584 |  |
Parent Company |  |  |  |
Assets |  |  |  |
Cash and cash equivalents | 191,776 | 260,255 | $ 292,277 | $ 282,036
Total investments in subsidiaries (primarily Sallie Mae Bank) | 2,963,949 | 2,401,114 |  |
Tax indemnification receivable | 39,207 | 168,011 |  |
Due from subsidiaries, net | 48,798 | 37,521 |  |
Other assets | 2,246 | 1,279 |  |
Total assets | 3,245,976 | 2,868,180 |  |
Liabilities |  |  |  |
Long-Term | 197,348 | 196,539 |  |
Income taxes payable, net | 37,271 | 159,954 |  |
Payable due to Navient | 9,480 | 10,575 |  |
Other liabilities | 29,221 | 26,856 |  |
Total liabilities | 273,320 | 393,924 |  |
Preferred stock, par value $0.20 per share, 20 million shares authorized: |  |  |  |
Common stock, par value $0.20 per share, 1.125 billion shares authorized: 449.9 million and 443.5 million shares issued, respectively | 89,972 | 88,693 |  |
Additional paid-in capital | 1,274,635 | 1,222,277 |  |
Accumulated other comprehensive income (net of tax expense of $3,436 and $1,696, respectively) | 10,623 | 2,748 |  |
Retained earnings | 1,340,017 | 868,182 |  |
Total SLM Corporation stockholders’ equity before treasury stock | 3,115,247 | 2,581,900 |  |
Less: Common stock held in treasury at cost: 14.2 million and 11.1 million shares, respectively | (142,591) | (107,644) |  |
Total equity | 2,972,656 | 2,474,256 |  |
Total liabilities and equity | 3,245,976 | 2,868,180 |  |
Parent Company | Series B Preferred Stock |  |  |  |
Preferred stock, par value $0.20 per share, 20 million shares authorized: |  |  |  |
Preferred stock issued | $ 400,000 | $ 400,000 |  |

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