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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 | $ 755,868 | $ 1,291,450 | $ 1,065,948
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation and amortization | 501,728 | 439,224 | 451,988
Amortization and write-off of financing costs on extinguished debt | 82,705 | 8,662 | 35,175
Gains related to mortgage servicing rights, premiums on loan sales and sales of other assets | (297,980) | (246,690) | (229,376)
Asset impairments | 88,676 | 89,787 | 0
Gain associated with remeasuring our investment in a joint venture entity to fair value at the date we acquired the remaining interest | 0 | 0 | (100,420)
Net realized and unrealized (gains) losses, primarily from investments | (17,394) | (28,907) | 7,400
Provision for doubtful accounts | 44,366 | 20,373 | 19,760
Net compensation expense for equity awards | 60,391 | 127,738 | 128,171
Equity income from unconsolidated subsidiaries | (126,161) | (160,925) | (324,664)
Distribution of earnings from unconsolidated subsidiaries | 155,975 | 199,011 | 336,925
Proceeds from sale of mortgage loans | 20,937,521 | 19,805,060 | 20,230,676
Origination of mortgage loans | (21,268,114) | (19,389,979) | (20,591,602)
Increase (decrease) in warehouse lines of credit | 406,789 | (351,586) | 417,995
Tenant concessions received | 48,030 | 21,249 | 38,400
Purchase of equity securities | (11,113) | (83,001) | (99,789)
Proceeds from sale of equity securities | 13,741 | 46,949 | 75,120
(Increase) decrease in real estate under development | (105,619) | 31,420 | (4,586)
Decrease (increase) in receivables, prepaid expenses and other assets (including contract and lease assets) | 371,009 | (821,134) | (773,361)
Increase in accounts payable and accrued expenses and other liabilities (including contract and lease liabilities) | 105,491 | 306,677 | 273,782
(Decrease) increase in compensation and employee benefits payable and accrued bonus and profit sharing | (100,142) | 244,895 | 270,371
Decrease (increase) in net income taxes receivable/payable | 173,648 | (274,436) | (47,074)
Other operating activities, net | 11,364 | (52,457) | (49,590)
Net cash provided by operating activities | 1,830,779 | 1,223,380 | 1,131,249
CASH FLOWS FROM INVESTING ACTIVITIES: |  |  |
Capital expenditures | (266,575) | (293,514) | (227,803)
Acquisition of businesses, including net assets acquired, intangibles and goodwill, net of cash acquired | (27,848) | (355,926) | (322,573)
Contributions to unconsolidated subsidiaries | (146,409) | (105,947) | (62,802)
Distributions from unconsolidated subsidiaries | 88,731 | 33,289 | 61,709
Other investing activities, net | 10,516 | 1,074 | (9,215)
Net cash used in investing activities | (341,585) | (721,024) | (560,684)
CASH FLOWS FROM FINANCING ACTIVITIES: |  |  |
Proceeds from senior term loans | 0 | 300,000 | 1,002,745
Repayment of senior term loans | 0 | (300,000) | (450,000)
Proceeds from revolving credit facility | 835,671 | 3,609,000 | 3,258,000
Repayment of revolving credit facility | (835,671) | (3,609,000) | (3,258,000)
Establishment of trust account for special purpose acquisition company | (402,500) | 0 | 0
Sale of non-controlling interest - special purpose acquisition company | 393,661 | 0 | 0
Proceeds from notes payable on real estate | 90,552 | 6,694 | 7,599
Repayments of notes payable on real estate | (24,704) | 0 | (19,058)
Repurchase of common stock | (50,028) | (145,137) | (161,034)
Acquisition of businesses (cash paid for acquisitions more than three months after purchase date) | (44,700) | (42,147) | (18,660)
Units repurchased for payment of taxes on equity awards | (43,835) | (18,426) | (29,386)
Non-controlling interest contributions | 2,173 | 46,612 | 25,355
Non-controlling interest distributions | (4,330) | (3,957) | (13,413)
Other financing activities, net | (41,893) | (4,901) | (4,453)
Net cash used in financing activities | (625,256) | (271,949) | (506,600)
Effect of currency exchange rate changes on cash and cash equivalents and restricted cash | 81,564 | (606) | (24,840)
NET INCREASE IN CASH AND CASH EQUIVALENTS AND RESTRICTED CASH | 945,502 | 229,801 | 39,125
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH, AT BEGINNING OF YEAR | 1,093,745 | 863,944 | 824,819
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH, AT END OF YEAR | 2,039,247 | 1,093,745 | 863,944
Cash paid during the year for: |  |  |
Interest | 67,463 | 86,666 | 104,165
Income tax payments, net | 51,681 | 365,065 | 375,849
Telford Homes |  |  |
CASH FLOWS FROM FINANCING ACTIVITIES: |  |  |
Repayment of debt assumed in acquisition | 0 | (110,687) | 0
FacilitySource |  |  |
CASH FLOWS FROM FINANCING ACTIVITIES: |  |  |
Repayment of debt assumed in acquisition | 0 | 0 | (26,295)
5.25% Senior Notes |  |  |
CASH FLOWS FROM FINANCING ACTIVITIES: |  |  |
Repayment of senior notes (including premium) | (499,652) | 0 | 0
5.00% Senior Notes |  |  |
CASH FLOWS FROM FINANCING ACTIVITIES: |  |  |
Repayment of senior notes (including premium) | $ 0 | $ 0 | $ (820,000)

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- Definition Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3521-108585 + Details
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- Definition Amount of cash (inflow) outflow from investing activities classified as other. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04(a)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24072-122690 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3213-108585 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3179-108585 + Details
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- Definition Net cash outflow or inflow from monetary allowance granted by the landlord to a tenant to entice tenant to move into landlords building which will enable the tenant to prepare the leased premises for tenants occupancy. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3213-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3179-108585 + Details
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