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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2020 | Jun. 30, 2019
Operating activities: |  |
Net loss | $ (129,188) | $ (36,839)
Adjustments to reconcile net loss to net cash used in operating activities: |  |
Depreciation | 34,271 | 38,582
Amortization of deferred drydocking and survey costs | 20,980 | 9,388
Amortization of debt premium and discounts | 1,357 | (1,019)
Provision for deferred income taxes | 206 | 6
(Gain) loss on asset dispositions, net | (6,991) | (776)
Affiliate credit loss impairment expense | 53,581 |
Affiliate guarantee obligation | 2,000 |
Long-lived asset impairments | 65,689 | (776)
Changes in investments in unconsolidated companies |  | 381
Compensation expense - stock-based | 2,736 | 9,215
Changes in assets and liabilities, net: |  |
Trade and other receivables | (4,991) | (10,921)
Changes in due to/from affiliate, net | 3,242 | 15,080
Accounts payable | (10,390) | (7,769)
Accrued costs and expenses | (13,007) | (4,977)
Cash paid for deferred drydocking and survey costs | (28,964) | (28,688)
Other, net | (3,354) | (2,386)
Net cash used in operating activities | (12,823) | (20,723)
Cash flows from investing activities: |  |
Proceeds from sales of assets | 20,906 | 20,566
Additions to properties and equipment | (4,075) | (8,873)
Net cash provided by investing activities | 16,831 | 11,693
Cash flows from financing activities: |  |
Principal payments on long-term debt | (4,742) | (3,792)
Taxes on share based awards | (612) | (1,760)
Other |  | 1
Net cash used in financing activities | (5,354) | (5,551)
Net change in cash, cash equivalents and restricted cash | (1,346) | (14,581)
Cash, cash equivalents and restricted cash at beginning of period | 227,608 | 397,744
Cash, cash equivalents and restricted cash at end of period | 226,262 | 383,163
Cash paid during the period for: |  |
Interest, net of amounts capitalized | 10,734 | 16,293
Income taxes | $ 6,461 | $ 7,754

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