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Consolidated Statements of Cash Flows | 12 Months Ended
--- | ---
Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($)
OPERATING ACTIVITIES |  |  |
Net income | $ 72,677,000 | $ 75,173,000 | $ 56,386,000
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation and amortization | 101,329,000 | 103,905,000 | 105,580,000
Deferred income taxes | 2,755,000 | (27,121,000) | (4,584,000)
Stock-based Compensation | 539,000 | 511,000 | 0
Amortization of stock-based compensation, net of tax | 0 | 0 | 856,000
Gain on disposal of property and equipment | (24,963,000) | (26,674,000) | (9,205,000)
Changes in certain working capital items: |  |  |
Trade receivables | 15,338,000 | 15,239,000 | 14,165,000
Prepaid expenses and other current assets | 1,227,000 | 860,000 | 5,017,000
Accounts payable, accrued liabilities, and accrued expenses | (26,012,000) | (26,893,000) | (11,063,000)
Accrued income taxes | 3,653,000 | (5,462,000) | (1,371,000)
Net cash provided by operating activities | 146,543,000 | 109,538,000 | 155,781,000
INVESTING ACTIVITIES |  |  |
Proceeds from sale of property and equipment | 130,752,000 | 147,578,000 | 57,280,000
Purchases of property and equipment, net of trades | (169,276,000) | (184,114,000) | (86,088,000)
Acquisition of business, net of cash acquired | 0 | (86,728,000) | 0
Change in other assets | 710,000 | (233,000) | 0
Net cash (used in) provided by investing activities | (37,814,000) | (123,497,000) | (28,808,000)
FINANCING ACTIVITIES |  |  |
Cash dividends paid | (6,589,000) | (6,667,000) | (6,666,000)
Shares withheld for employee taxes related to stock-based compensation | (213,000) | (198,000) | 0
Repayments on acquired debt | 0 | (23,303,000) | 0
Repurchases of common stock | (25,087,000) | 0 | (14,678,000)
Net cash used in financing activities | (31,889,000) | (30,168,000) | (21,344,000)
Net increase (decrease) in cash, cash equivalents and restricted cash | 76,840,000 | (44,127,000) | 105,629,000
CASH, CASH EQUIVALENTS AND RESTRICTED CASH |  |  |
Beginning of period | 106,098,000 | 150,225,000 | 44,596,000
End of Period | 182,938,000 | 106,098,000 | 150,225,000
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION |  |  |
Interest paid | 0 | 153,000 | 0
Cash paid during the period for income taxes, net of refunds | 12,832,000 | 21,909,000 | 35,537,000
Noncash investing and financing activities: |  |  |
Purchased property and equipment in accounts payable | 1,944,000 | 3,387,000 | 63,000
Sold revenue equipment in other current assets | 3,783,000 | 869,000 | 160,000
RECONCILIATION OF CASH, CASH EQUIVALENTS AND RESTRICTED CASH |  |  |
Cash and Cash Equivalents | 161,448,000 | 75,378,000 | 128,507,000
Restricted Cash included in other current assets | 3,105,000 | 7,936,000 | 9,335,000
Restricted Cash included in other assets | 18,385,000 | 22,784,000 | 12,383,000
End of Period | $ 182,938,000 | $ 106,098,000 | $ 150,225,000

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- Definition Amount of cash outflow to satisfy an employee's income tax withholding obligation as part of a net-share settlement of a share-based award. + 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=109223946&loc=d3e3291-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 25 -Paragraph 19A -URI http://asc.fasb.org/extlink&oid=107668666&loc=SL79513924-113897 + 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=109223946&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=109223946&loc=d3e3213-108585 + 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://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 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 current cash, cash equivalents and investments that are restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against short-term borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. Includes current cash equivalents and investments that are similarly restricted as to withdrawal, usage or disposal. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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