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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Cash flows from operating activities: |  |  |
Net income | $ 108,648 | $ 109,546 | $ 108,080
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Net amortization of deferred gains, premiums, and discounts on loans, investments, Farmer Mac Guaranteed Securities, and USDA Securities | 8,343 | (10,399) | (1,104)
Amortization of debt premiums, discounts, and issuance costs | 21,319 | 50,052 | 30,207
Net change in fair value of trading securities, hedged assets, and financial derivatives | (256,466) | (220,080) | (23,747)
Gain/(loss) on sale of real estate owned | (463) | 0 | 7
Total provision for allowance for losses | 8,055 | 3,501 | 335
Excess tax benefits related to stock-based awards | (440) | 449 | 946
Deferred income taxes | (2,406) | 789 | 2,625
Other | 0 | 236 | 0
Stock-based compensation expense | 4,128 | 2,258 | 2,517
Purchases of loans held for sale | (59,150) | 0 | (25,000)
Proceeds from the sale of loans held for sale | 15,000 | 0 | 25,000
Proceeds from repayment of loans purchased as held for sale | 59,370 | 54,195 | 92,060
Net change in: |  |  |
Interest receivable | 11,054 | (19,080) | (25,866)
Guarantee and commitment fees receivable | 164 | (59) | (188)
Other assets | (3,348) | (2,744) | (6,435)
Accrued interest payable | (14,221) | 10,216 | 21,341
Other liabilities | 5,866 | 1,421 | (747)
Net cash (used in)/provided by operating activities | (94,547) | (19,699) | 200,031
Cash flows from investing activities: |  |  |
Purchases of loans held for investment | (3,167,198) | (2,234,715) | (947,495)
Purchases of defaulted loans | (6,272) | (469) | (1,483)
Proceeds from repayment of loans purchased as held for investment | 1,715,663 | 758,192 | 611,344
Proceeds from sale of Farmer Mac Guaranteed Securities | 165,054 | 321,414 | 382,929
Proceeds from sale of real estate owned | 4,169 | 0 | 116
Net cash used in investing activities | (1,736,091) | (2,384,587) | (591,462)
Cash flows from financing activities: |  |  |
Payments to third parties on debt securities of consolidated trusts | (504,807) | (181,493) | (138,806)
Proceeds from common stock issuance | 56 | 44 | 7
Retirement of preferred stock | (60,000) | (75,000) | 0
Proceeds from preferred stock issuance, net of stock issuance costs | 193,163 | 96,659 | 0
Tax payments related to share-based awards | (560) | (1,777) | (2,631)
Purchases of common stock | (235) | 0 | 0
Dividends paid on common and preferred stock | (50,649) | (43,894) | (37,905)
Net cash provided by financing activities | 2,260,198 | 2,583,411 | 514,665
Net change in cash and cash equivalents | 429,560 | 179,125 | 123,234
Cash and cash equivalents at beginning of period | 604,381 | 425,256 | 302,022
Cash and cash equivalents at end of period | 1,033,941 | 604,381 | 425,256
Cash paid during the period for: |  |  |
Interest | 283,335 | 365,526 | 268,728
Income taxes | 30,000 | 23,100 | 30,882
Non-cash activity: |  |  |
Real estate owned acquired through loan liquidation | 0 | 0 | 128
Loans acquired and securitized as Farmer Mac Guaranteed Securities | 165,054 | 321,414 | 382,929
Consolidation of Farmer Mac Guaranteed Securities from off-balance sheet to loans held for investment in consolidated trusts and to debt securities of consolidated trusts held by third parties | 165,054 | 263,561 | 255,080
Reclassification of defaulted loans from loans held for investment in consolidated trusts to loans held for investment | 47,036 | 5,479 | 7,748
Reclassification of loans held for sale to loans held for investment | 44,150 | 0 | 0
Capitalized interest | 1,348 | 0 | 0
Purchases of securities - traded, not yet settled | 0 | 0 | (1,400)
Medium-term Notes |  |  |
Cash flows from financing activities: |  |  |
Proceeds from issuance of debt | 13,509,754 | 10,195,775 | 7,692,845
Payments to redeem notes | (10,414,765) | (7,970,126) | (6,834,057)
Notes Payable to Banks |  |  |
Cash flows from financing activities: |  |  |
Proceeds from issuance of debt | 68,548,733 | 64,642,545 | 41,726,788
Payments to redeem notes | (68,960,492) | (64,079,322) | (41,891,576)
Available-for-sale securities |  |  |
Cash flows from investing activities: |  |  |
Purchases of securities | (2,852,658) | (2,166,376) | (1,221,392)
Proceeds from repayment of securities | 1,961,895 | 1,425,402 | 1,242,310
Proceeds from sale of available-for-sale investment securities | 0 | 12,367 | 0
Farmer Mac Guaranteed Securities and USDA Securities |  |  |
Cash flows from investing activities: |  |  |
Purchases of securities | (2,074,701) | (2,691,104) | (3,470,832)
Proceeds from repayment of securities | $ 2,517,957 | $ 2,190,702 | $ 2,813,041

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- Definition Amount of cash outflow to satisfy grantee's tax withholding obligation for award under share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585 + Details
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- Definition The aggregate cash outflow used to purchase all loans that are held with the intention to resell in the near future. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 21 -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3461-108585 + Details
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