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Consolidated Statements of Cash Flows - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Cash flows from operating activities: |  |  |
Net income | $ 38,062 | $ 25,170 | $ 18,799
Reconciliations of net income to net cash from operating activities: |  |  |
Depreciation and amortization | 4,219 | 5,452 | 3,253
Losses (gains) recognized on investments | 163 | (51) | (3)
Losses recognized on sale of property | 64 |  | 31
Deferred income taxes | (1,192) | 4,039 | (1,704)
Share-based compensation | 5,502 | 4,184 | 2,782
Excess tax from share-based compensation |  |  | (253)
Changes in certain operating assets and liabilities: |  |  |
Trade accounts receivable | (14,933) | (10,180) | (35,955)
Income taxes receivable | 1,686 | (1,686) | 1,038
Prepaid expenses and other | (8,156) | (1,825) | (726)
Accounts payable | (830) | 222 | 1,727
Accrued payroll, payroll taxes and related benefits | (21,863) | 28,529 | 31,767
Other accrued liabilities | 12,550 | 1,350 | 1,508
Income taxes payable | 4,403 | (3,041) | 3,294
Workers' compensation claims liabilities | 49,632 | 57,140 | 51,235
Safety incentives liability | 678 | 3,697 | 3,582
Customer deposits, long-term liabilities and other assets, net | (201) | (141) | (68)
Net cash provided by operating activities | 69,784 | 112,859 | 80,307
Cash flows from investing activities: |  |  |
Purchase of property and equipment | (5,679) | (3,687) | (7,106)
Proceeds from sale of property | 485 |  | 1,459
Purchase of investments | (1,946) | (6,283) | (264)
Proceeds from sales and maturities of investments | 1,885 | 10,718 | 4,796
Purchase of restricted investments | (108,739) | (381,207) | (28,072)
Proceeds from sales and maturities of restricted investments | 74,650 | 55,482 | 34,878
Net cash (used in) provided by investing activities | (39,344) | (324,977) | 5,691
Cash flows from financing activities: |  |  |
Proceeds from credit-line borrowings | 8,500 | 24,899 | 14,868
Payments on credit-line borrowings | (8,500) | (24,899) | (14,868)
Payments on long-term debt | (220) | (221) | (15,220)
Common stock repurchased on vesting of restricted stock units | (2,952) | (1,673) | (433)
Dividends paid | (7,348) | (7,276) | (6,359)
Proceeds from exercise of stock options | 577 | 163 | 72
Excess tax benefits from share-based compensation |  |  | 253
Net cash used in financing activities | (9,943) | (9,007) | (21,687)
Net increase (decrease) in cash, cash equivalents and restricted cash | 20,497 | (221,125) | 64,311
Cash, cash equivalents and restricted cash, beginning of period | 120,205 | 341,330 | 277,019
Cash, cash equivalents and restricted cash, end of period | $ 140,702 | $ 120,205 | $ 341,330

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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://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=109223946&loc=d3e3179-108585 + Details
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- Definition Amount of cash inflow from exercise of stock options granted under share-based compensation arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109197908&loc=SL79508275-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3255-108585 + 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=109223946&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=26873400&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=109223946&loc=d3e3291-108585 + 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://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=109223946&loc=d3e3602-108585 + Details
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