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Consolidated Statements of Cash Flows - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Cash flows from operating activities |  |  |
Net income including noncontrolling interests | $ 88,952 | $ 118,921 | $ 137,128
Adjustments to reconcile net income to net cash provided by operating activities |  |  |
Depreciation and amortization | 144,209 | 127,980 | 125,700
Amortization of debt issue costs | 2,817 | 1,356 | 973
Amortization of convertible notes discount | 0 | 3,831 | 0
Loss on disposal of property and equipment | 338 | 116 | 1,042
Provision for doubtful accounts | 8 | (1,503) | 290
Deferred taxes | (3,468) | 1,271 | (123,338)
Foreign currency transaction gains and losses | 4,916 | (493) | 4,472
Equity in earnings of unconsolidated joint ventures | (36,862) | (30,059) | (41,721)
Return on investments in unconsolidated joint ventures | 24,494 | 41,457 | 51,077
Stock-based compensation | 20,187 | 15,234 | 8,272
Contributions of treasury stock | 54,905 | 55,327 | 53,644
Changes in assets and liabilities, net of acquisitions and newly consolidated joint ventures |  |  |
Accounts receivable | 99,894 | (8,623) | (30,206)
Contract assets | 1,494 | 9,243 | (49,999)
Prepaid expenses and other assets | (18,798) | 11,494 | (22,110)
Accounts payable | (31,766) | 1,494 | (17,123)
Accrued expenses and other current liabilities | (74,683) | 3,405 | 78,366
Contract liabilities | (30,407) | (29,674) | 20,146
Income taxes | 2,878 | (3,080) | (5,421)
Other long-term liabilities | (43,534) | (28,536) | 29,048
Net cash provided by operating activities | 205,574 | 289,161 | 220,240
Cash flows from investing activities |  |  |
Capital expenditures | (21,105) | (34,036) | (67,597)
Proceeds from sale of property and equipment | 1,329 | 1,546 | 3,789
Payments for acquisitions, net of cash acquired | (198,256) | (302,894) | (494,826)
Investments in unconsolidated joint ventures | (38,459) | (11,038) | (24,579)
Return of investments in unconsolidated joint ventures | 772 | 53 | 12,410
Proceeds from sales of investments in unconsolidated joint ventures | 14,812 | 0 | 0
Net cash used in investing activities | (240,907) | (346,369) | (570,803)
Cash flows from financing activities |  |  |
Proceeds from borrowings | 0 | 212,900 | 597,200
Repayments of borrowings | (50,000) | (212,900) | (777,200)
Payments for debt costs and credit agreement | (1,937) | 0 | (286)
Proceeds from issuance of convertible notes | 0 | 400,000 | 0
Payments for purchase of bond hedges | 0 | (54,968) | 0
Proceeds from issuance of warrants | 0 | 13,808 | 0
Transaction costs paid in connection with convertible notes issuance | 0 | (10,250) | 0
Contributions by noncontrolling interests | 1,754 | 2,215 | 10,093
Distributions to noncontrolling interests | (37,932) | (5,816) | (42,285)
Repurchases of common stock | (21,701) | 0 | (6,272)
Taxes paid on vested stock | (2,242) | (1,149) | 0
Proceeds from issuance of common stock | 5,555 | 4,386 | 536,879
Dividend paid | 0 | 0 | (52,093)
Net cash provided by financing activities | (106,503) | 348,226 | 266,036
Effect of exchange rate changes | (1,496) | 823 | (1,294)
Net increase (decrease) in cash, cash equivalents and restricted cash | (143,332) | 291,841 | (85,821)
Cash, cash equivalents and restricted cash |  |  |
Beginning of year | 487,215 | 195,374 | 281,195
End of year | 343,883 | 487,215 | 195,374
Cash paid during the year for |  |  |
Interest | 14,993 | 14,207 | 23,254
Income taxes (net of refunds) | $ 22,461 | $ 55,354 | $ 60,477

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- Definition Amount of noncash expense (reversal of expense) for other postretirement benefits. Excludes pension benefits. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 + Details
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- Definition Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(f)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 + Details
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