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Consolidated Statements of Cash Flows - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Cash flows from operating activities: |  |  |
Net (loss) income | $ (42,718) | $ 8,477 | $ 42,503
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Provision for losses on accounts receivable | 3,134 | 255 | 507
Deferral (reversal) of gain on sales to equity method investee, net | 14 | (7) | (189)
Depreciation and amortization | 65,480 | 80,529 | 75,859
Impairment of property and equipment | 26,569 | 0 | 0
Amortization of deferred financing fees | 154 | 147 | 148
Deferred income tax (benefit) expense | (15,092) | 3,454 | 13,840
Income tax benefit (expense) arising from restricted share vesting and stock options exercised | 167 | (105) | (44)
Stock-based compensation expense | 2,270 | 819 | 5,177
Equity in income of affiliate | (3,944) | (7,017) | (7,732)
Return on investment in affiliated company | 1,470 | 1,225 | 1,960
(Gain) loss on disposition of property and equipment | (7,677) | (2,829) | 298
Loss on disposition of reportable segment | 40,431 | 0 | 0
Return on investment in available-for-sale securities | (25) | 13 | (13)
Changes in operating assets and liabilities: |  |  |
Receivables and advances | (60,849) | (6,706) | (27,199)
Prepaid expenses and other assets | 531 | 487 | (2,127)
Inventory and supplies | 1,091 | (143) | 168
Insurance and claims accrual | 32,203 | 945 | 2,412
Accounts payable and accrued expenses | 19,831 | (15,513) | 19,232
Net cash flows provided by operating activities | 63,040 | 64,031 | 124,800
Cash flows from investing activities: |  |  |
Acquisition of Landair Holdings, Inc., net of cash acquired | 0 | 0 | (105,946)
Redemption (purchase) of available-for-sale securities | 1,442 | (1,365) | (1,496)
Acquisition of property and equipment | (94,049) | (138,273) | (75,142)
Proceeds from disposition of reportable segment | 108,375 | 0 | 0
Proceeds from disposition of property and equipment | 122,278 | 46,609 | 61,687
Net cash flows provided (used in) investing activities | 138,046 | (93,029) | (120,897)
Cash flows from financing activities: |  |  |
Change in checks outstanding in excess of bank balances | 839 | (1,265) | 1,857
Proceeds from issuance of notes payable | 75,591 | 107,251 | 100,811
Repayments of notes payable | (289,834) | (44,278) | (89,569)
Repayments of capital lease obligations | (20,083) | (7,225) | (3,883)
Proceeds under revolving credit facility | 1,341,678 | 1,734,338 | 1,598,213
Repayments under revolving credit facility | (1,326,678) | (1,738,249) | (1,603,309)
Payment of minimum tax withholdings on stock compensation | (297) | (1,110) | (242)
Debt refinancing costs | 0 | 0 | (10)
Common stock repurchased | (17,486) | 0 | 0
Net cash flows (used in) provided by financing activities | (236,270) | 49,462 | 3,868
Net change in cash and cash equivalents | (35,184) | 20,464 | 7,771
Cash and cash equivalents at beginning of year | 43,591 | 23,127 | 15,356
Cash and cash equivalents at end of year | 8,407 | 43,591 | 23,127
Supplemental disclosure of cash flow information: |  |  |
Interest, net of capitalized interest | 7,365 | 11,026 | 8,568
Income taxes | 870 | 752 | (5,388)
Non-cash transactions during the year for: |  |  |
Equipment purchased under finance leases | 3,258 | 0 | 19,638
Contingent liabilities | $ 44,151 | $ 0 | $ 0

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