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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 9 Months Ended
--- | ---
Sep. 30, 2020 | Sep. 30, 2019
Operating Activities |  |
Net income | $ 405,171 | $ 422,186
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Depreciation of flight equipment | 577,969 | 514,948
Stock-based compensation | 14,956 | 14,934
Deferred taxes | 101,285 | 97,566
Amortization of debt discounts and issuance costs | 31,660 | 26,330
Amortization of prepaid lease costs | 32,142 | 24,190
Gain on aircraft sales, trading and other activity | (27,281) | (45,123)
Changes in operating assets and liabilities: |  |
Other assets | (330,804) | (149,740)
Accrued interest and other payables | (84,045) | 51,156
Rentals received in advance | (3,464) | 15,109
Net cash provided by operating activities | 717,589 | 971,556
Investing Activities |  |
Acquisition of flight equipment under operating lease | (777,410) | (3,021,758)
Payments for deposits on flight equipment purchases | (581,054) | (727,982)
Proceeds from aircraft sales, trading and other activity | 151,131 | 426,382
Acquisition of aircraft furnishings, equipment and other assets | (142,866) | (236,847)
Net cash used in investing activities | (1,350,199) | (3,560,205)
Financing Activities |  |
Issuance of common stock upon exercise of options | 4,556 | 31,823
Cash dividends paid on Class A common stock | (51,116) | (43,383)
Preferred dividends paid | (11,531) | (8,115)
Tax withholdings on stock-based compensation | (8,618) | (4,089)
Net change in unsecured revolving facility | (20,000) | 8,000
Proceeds from debt financings | 3,074,665 | 3,135,918
Payments in reduction of debt financings | (1,457,740) | (947,837)
Net proceeds from preferred stock issuance |  | 242,139
Debt issuance costs | (5,692) | (9,443)
Security deposits and maintenance reserve receipts | 91,337 | 230,966
Security deposits and maintenance reserve disbursements | (59,175) | (33,905)
Net cash provided by financing activities | 1,556,686 | 2,602,074
Net increase in cash | 924,076 | 13,425
Cash, cash equivalents and restricted cash at beginning of period | 338,061 | 322,998
Cash, cash equivalents and restricted cash at end of period | 1,262,137 | 336,423
Supplemental Disclosure of Cash Flow Information |  |
Cash paid during the period for interest, including capitalized interest of $39,960 and $46,314 at September 30, 2020 and 2019, respectively | 371,947 | 358,237
Cash paid for income taxes | 29,696 | 9,515
Supplemental Disclosure of Noncash Activities |  |
Buyer furnished equipment, capitalized interest and deposits on flight equipment purchases applied to acquisition of flight equipment | 575,958 | 1,161,573
Cash dividends declared on common stock, not yet paid | $ 17,068 | $ 14,644

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