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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Statement of Cash Flows [Abstract] |  |  |
Net Income | $ 1,907,600 | $ 1,815,792 | $ 1,625,133
Adjustments: |  |  |
Depreciation and amortization | 1,245,942 | 1,033,697 | 951,194
Impairment losses | 0 | 33,651 | 0
Net deferred income tax expense (benefit) | 7,745 | (2,679) | 1,730
(Gain) loss on derivative instruments not designated as hedges | (1,431) | 61,148 | (61,704)
Share-based compensation expense | 75,930 | 46,061 | 69,459
Equity investment income | (230,980) | (210,756) | (156,247)
Amortization of debt issuance costs | 31,991 | 41,978 | 45,943
Amortization of commercial paper notes discount | 31,263 | 10,652 | 0
Loss on extinguishment of debt | 6,326 | 0 | 0
Change in fair value of contingent consideration | 18,400 | 0 | 0
Gain on sale of property and equipment | 0 | 0 | (30,902)
Gain on sale of unconsolidated affiliate | 0 | (13,680) | 0
Recognition of deferred gain | 0 | (21,794) | 0
Changes in operating assets and liabilities: |  |  |
Increase in trade and other receivables, net | (9,898) | (9,573) | (32,043)
(Increase) decrease in inventories | (8,533) | (23,849) | 2,424
Decrease (increase) in prepaid expenses and other assets | 15,669 | (71,770) | 20,859
Increase in accounts payable | 75,281 | 91,737 | 36,780
(Decrease) increase in accrued interest | (4,460) | 18,773 | 1,303
Increase in accrued expenses and other liabilities | 96,490 | 42,937 | 34,215
Increase in customer deposits | 280,139 | 385,990 | 274,705
Dividends received from unconsolidated affiliates | 150,177 | 243,101 | 109,677
Other, net | 28,715 | 7,723 | (17,960)
Net cash provided by operating activities | 3,716,366 | 3,479,139 | 2,874,566
Investing Activities |  |  |
Purchases of property and equipment | (3,024,663) | (3,660,028) | (564,138)
Cash received on settlement of derivative financial instruments | 7,621 | 76,529 | 63,224
Cash paid on settlement of derivative financial instruments | (68,836) | (98,074) | 0
Investments in and loans to unconsolidated affiliates | (25,569) | (27,172) | (10,396)
Cash received on loans to unconsolidated affiliates | 32,870 | 124,238 | 62,303
Proceeds from the sale of property and equipment | 0 | 0 | 230,000
Proceeds from the sale of unconsolidated affiliate | 0 | 13,215 | 0
Acquisition of Silversea Cruises, net of cash acquired | 0 | (916,135) | 0
Other, net | (12,829) | (1,731) | 5,415
Net cash used in investing activities | (3,091,406) | (4,489,158) | (213,592)
Financing Activities |  |  |
Debt proceeds | 3,525,564 | 8,590,740 | 5,866,966
Debt issuance costs | (50,348) | (81,959) | (51,590)
Repayments of debt | (4,060,244) | (6,963,511) | (7,835,087)
Proceeds from issuance of commercial paper notes | 26,240,540 | 4,730,286 | 0
Repayments of commercial paper notes | (25,613,111) | (3,965,450) | 0
Purchase of treasury stock | (99,582) | (575,039) | (224,998)
Dividends paid | (602,674) | (527,494) | (437,455)
Proceeds from exercise of common stock options | 1,742 | 4,264 | 2,525
Other, net | (12,258) | (13,764) | 3,843
Net cash (used in) provided by financing activities | (670,371) | 1,198,073 | (2,675,796)
Effect of exchange rate changes on cash | 1,297 | (20,314) | 2,331
Net (decrease) increase in cash and cash equivalents | (44,114) | 167,740 | (12,491)
Cash and cash equivalents at beginning of year | 287,852 | 120,112 | 132,603
Cash and cash equivalents at end of year | 243,738 | 287,852 | 120,112
Cash paid during the year for: |  |  |
Interest, net of amount capitalized | 246,312 | 252,466 | 249,615
Non-Cash Investing Activities |  |  |
Contingent consideration for the acquisition of Silversea Cruises | 0 | 44,000 | 0
Purchases of property and equipment included in accounts payable and accrued expenses and other liabilities | 86,155 | 0 | 139,644
Notes receivable issued upon sale of property and equipment | $ 0 | $ 0 | $ 20,409

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- Definition Amount of cash paid for interest, excluding capitalized interest, classified as operating activity. Includes, but is not limited to, payment to settle zero-coupon bond for accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4297-108586 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 17 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3367-108585 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3536-108585 + Details
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