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Consolidated Statements of Cash Flows - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Cash flows from operating activities: |  |  |
Net income | $ 537,521 | $ 425,262 | $ 382,927
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation and amortization | 22,667 | 22,269 | 21,534
Equity-based compensation expense | 44,562 | 43,598 | 54,091
Contract land deposit impairments (recoveries), net | 1,238 | (4,269) | (11,058)
Gain on sale of loans, net | (99,132) | (85,535) | (67,891)
Deferred tax expense (benefit) | 61,290 | (10,024) | 1,902
Mortgage loans closed | (4,077,372) | (3,660,269) | (3,111,413)
Mortgage loans sold and principal payments on mortgage loans held for sale | 4,182,220 | 3,710,250 | 3,059,889
Distribution of earnings from unconsolidated joint ventures | 5,614 | 9,094 | 15,511
Net change in assets and liabilities: |  |  |
Increase in inventory | (154,099) | (85,194) | (134,803)
Decrease (increase) in contract land deposits | 8,177 | (32,280) | (37,561)
Increase in receivables | (502) | (9,083) | (1,527)
Increase in accounts payable and accrued expenses | 10,789 | 58,532 | 55,404
Increase in customer deposits | 27,797 | 11,271 | 4,210
Other, net | (1,866) | 4,504 | (4,513)
Net cash provided by operating activities | 568,904 | 398,126 | 226,702
Cash flows from investing activities: |  |  |
Investments in and advances to unconsolidated joint ventures | (3,800) | (653) | (1,917)
Distribution of capital from unconsolidated joint ventures | 7,203 | 12,594 | 18,489
Purchase of property, plant and equipment | (20,269) | (22,369) | (18,277)
Proceeds from the sale of property, plant and equipment | 847 | 1,000 | 683
Net cash used in investing activities | (16,019) | (9,428) | (1,022)
Cash flows from financing activities: |  |  |
Purchase of treasury stock | (422,166) | (455,351) | (431,367)
Repayments under non-recourse debt related to consolidated variable interest entity | 0 | 0 | (64)
Distributions to partner in consolidated variable interest entity | 0 | (150) | (300)
Proceeds from the exercise of stock options | 140,525 | 38,106 | 85,948
Net cash used in financing activities | (281,641) | (417,395) | (345,783)
Net increase (decrease) in cash and cash equivalents | 271,244 | (28,697) | (120,103)
Cash and cash equivalents, beginning of the year | 396,619 | 425,316 | 545,419
Cash and cash equivalents, end of the year | 667,863 | 396,619 | 425,316
Supplemental disclosures of cash flow information: |  |  |
Interest paid during the year, net of interest capitalized | 23,251 | 20,922 | 24,546
Income taxes paid during the year, net of refunds | $ 260,232 | $ 218,984 | $ 194,670

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- Definition The cash inflow from sales of loans that are secured with real estate mortgages and are held with the intention to resell in the near future. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3536-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 21 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3461-108585 + Details
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- Definition The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3179-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 + Details
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- Definition The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3255-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 + Details
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- References No definition available. + Details
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