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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
Cash flows from operating activities: |  |
Net (loss) income | $ (3,734) | $ 2,936
Adjustments to reconcile net (loss) income to net cash used in operating activities: |  |
Depreciation and amortization | 19,797 | 21,700
Stock-based compensation expense | 499 | 487
Gain on sale of property and equipment | (2,311) | (2,217)
Unrealized loss on interest rate swap | 4,970 | 1,447
Other non-cash items | 1,821 | 80
Changes in assets and liabilities: |  |
Accounts receivable | (13,911) | (24,722)
Contract assets | (15,682) | (2,328)
Other current assets | (4,849) | (2,231)
Other long-term assets | 204 | 182
Accounts payable | 23,934 | (59,198)
Contract liabilities | (15,389) | 2,590
Operating lease assets and liabilities, net | 119 | (1,447)
Accrued liabilities | (179) | (9,663)
Other long-term liabilities | (756) | 288
Net cash used in operating activities | (5,467) | (72,096)
Cash flows from investing activities: |  |
Purchase of property and equipment | (9,311) | (14,377)
Proceeds from sale of property and equipment | 6,902 | 4,398
Net cash used in investing activities | (2,409) | (9,979)
Cash flows from financing activities: |  |
Borrowings under revolving line of credit |  | 40,000
Payments on revolving line of credit |  | (40,000)
Proceeds from issuance of long-term debt | 6,800 | 23,105
Repayment of long-term debt | (14,976) | (17,170)
Proceeds from issuance of common stock purchased under a long-term incentive plan | 578 | 1,804
Repurchase of common stock | (7,393) |
Dividends paid | (2,919) | (3,043)
Other | (1,285) | (26)
Net cash (used in) provided by financing activities | (19,195) | 4,670
Effect of exchange rate changes on cash and cash equivalents | 259 | 327
Net change in cash and cash equivalents | (26,812) | (77,078)
Cash and cash equivalents at beginning of the year | 120,286 | 151,063
Cash and cash equivalents at end of the year | 93,474 | 73,985
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION |  |
Cash paid for interest | 4,061 | 4,065
Cash paid for income taxes, net of refunds received | (369) | (707)
Leased assets obtained in exchange for new operating leases | 34,711 | 8,847
SUPPLEMENTAL DISCLOSURES OF NONCASH INVESTING AND FINANCING ACTIVITIES |  |
Dividends declared and not yet paid | $ 2,895 | $ 3,051

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