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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
OPERATING ACTIVITIES |  |  |
Net income | $ 260,824 | $ 203,347 | $ 231,663
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation, amortization and other non-cash charges | 89,444 | 79,544 | 64,675
Pension settlement loss |  | 49,898 |
Provision for deferred income taxes | (1,215) | (7,228) | 7,628
Stock based compensation expense | 20,850 | 14,158 | 13,726
Provision for expected credit losses | 17,536 | 15,145 | 13,606
Changes in assets and liabilities: |  |  |
Trade accounts receivables and other accounts receivables | (12,045) | (20,151) | (12,549)
Financing receivables | (11,787) | (9,080) | (10,784)
Materials and supplies | (10,706) | (2,151) | (374)
Other current assets | 6,102 | (14,009) | (7,121)
Other non-current assets | 16,409 | 600 | 11,329
Accounts payable and accrued expenses | 50,212 | 5,611 | (10,691)
Unearned revenue | 7,276 | 5,424 | 4,901
Accrued insurance | 1,889 | 1,915 | (686)
Pension funding |  | (144) |
Long-term accrued liabilities | 996 | (3,306) | (5,922)
Net cash provided by operating activities | 435,785 | 319,573 | 299,401
INVESTING ACTIVITIES |  |  |
Cash used for acquisitions of companies, net of cash acquired | (147,613) | (430,558) | (76,769)
Capital expenditures | (23,229) | (27,146) | (27,179)
Cash from sale of franchises | 495 | 617 | 343
Derivative investments | 216 | 104 | 297
Proceeds from sale of assets | 7,700 | 1,758 | 1,840
Investment tax credits | 36 | 118 | 93
Net cash used in investing activities | (162,395) | (455,107) | (101,375)
FINANCING ACTIVITIES |  |  |
Payment of contingent consideration | (24,011) | (15,969) | (13,129)
Borrowings under term loan |  | 250,000 |
Borrowings under revolving commitment | 135,000 | 190,000 |
Repayments on term loan | (54,000) | (60,000) |
Repayments on revolving commitment | (169,500) | (88,500) |
Payment of dividends | (160,487) | (153,836) | (152,742)
Cash paid for common stock purchased | (8,275) | (10,009) | (9,541)
Net cash (used in)/provided by financing activities | (281,273) | 111,686 | (175,412)
Effect of exchange rate changes on cash | 12,084 | 2,639 | (14,179)
Net increase/(decrease) in cash and cash equivalents | 4,201 | (21,209) | 8,435
Cash and cash equivalents at beginning of year | 94,276 | 115,485 | 107,050
Cash and cash equivalents at end of year | 98,477 | 94,276 | 115,485
Supplemental disclosure of cash flow information |  |  |
Cash paid for interest | 5,056 | 6,452 | 25
Cash paid for income taxes, net | 81,184 | 75,812 | 77,351
Non-cash additions to operating lease right-of-use assets | $ 89,016 | $ 75,782 |

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- Definition The cash outflow to reacquire common stock during the period. + 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 (a) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585 + Details
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- Definition Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity. + 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 (a) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585 + Details
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- Definition The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase. + 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 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3213-108585 + Details
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- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + 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 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3213-108585 + Details
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- Definition The cash inflow from bank borrowing during the year. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585 + Details
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- Definition Amount of cash inflow from contractual arrangement with the 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 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -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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- Definition The cash inflow from disposal of asset without physical form usually arising from contractual or other legal rights, excluding goodwill. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3179-108585 + Details
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- Definition Amount of cash inflow from the sale of tangible or intangible assets used to produce goods or deliver services, classified as other. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3179-108585 + Details
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- Definition Amount of expense (reversal of expense) for expected credit loss on accounts receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(5)) -URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227 + 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=121586364&loc=d3e3291-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -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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- Definition The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer. + 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=121586364&loc=d3e3291-108585 + Details
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- Definition Amount of noncash expense for share-based payment arrangement. + 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 (a) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 + Details
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