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Consolidated Statements of Cash Flows - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
OPERATING ACTIVITIES: |  |  |
Net income | $ 18,416 | $ 90,672 | $ 76,516
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation | 64,605 | 62,806 | 55,012
Bad debt expense | 2,396 | 917 | 1,044
Stock compensation—net of excess tax benefits | 553 | 715 | 441
Provision for deferred income taxes | 2,886 | 14,541 | 17,832
Recognized (gain) on marketable equity securities | (1,618) | (1,129) | (8,197)
Gain on disposition of equipment | (1,043) | (3,250) | (1,446)
Changes in operating assets and liabilities: |  |  |
Accounts receivable | 50,798 | (2,152) | (47,132)
Prepaid expenses, deposits, inventories, and other assets | 2,538 | (7,257) | (865)
Income taxes refundable | 1,768 | (5,373) | 591
Income taxes payable | 0 | (4,364) | 4,364
Trade accounts payable | (10,980) | 2,198 | 5,945
Accrued expenses and other liabilities | (15,742) | 20,491 | (2,365)
Net cash provided by operating activities | 114,577 | 168,815 | 101,740
INVESTING ACTIVITIES: |  |  |
Purchases of property and equipment | (34,060) | (63,961) | (19,144)
Purchase of a business, net of cash acquired | 0 | (65,797) | 0
Proceeds from disposition of equipment | 22,622 | 17,406 | 31,680
Sales of marketable equity securities | 143 | 0 | 3,109
Purchases of marketable equity securities, net of return of capital | 0 | (1,175) | (6,395)
Net cash (used in) provided by investing activities | (11,295) | (113,527) | 9,250
FINANCING ACTIVITIES: |  |  |
Borrowings under line of credit | 879,191 | 945,610 | 654,212
Repayments under line of credit | (879,191) | (945,610) | (672,458)
Borrowings of long-term debt | 0 | 74,925 | 21,408
Repayments of long-term debt | (71,105) | (67,335) | (75,115)
Borrowings under margin account | 46 | 1,229 | 6,510
Repayments under margin account | (960) | (1,529) | (16,547)
Repurchases of treasury stock | (4,736) | (7,000) | (10,828)
Net cash (used in) provided by financing activities | (76,755) | 290 | (92,818)
NET INCREASE IN CASH AND CASH EQUIVALENTS | 26,527 | 55,578 | 18,172
CASH AND CASH EQUIVALENTS—Beginning of year | 74,087 | 18,509 | 337
CASH AND CASH EQUIVALENTS—End of year | 100,614 | 74,087 | 18,509
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION— |  |  |
Interest | 9,762 | 7,842 | 8,144
Income taxes | 5,510 | 23,243 | 3,870
NON-CASH INVESTING AND FINANCING ACTIVITIES— |  |  |
Purchases of revenue equipment included in accounts payable | $ 25,147 | $ 431 | $ 383

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