| SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS |
SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS | | | | | | | | | | | | | | | | | | | | (In thousands) | Description | | Balance at Beginning of Year | | Charged to Costs and Expenses | | Deductions | | Balance at End of Year | For the Year Ended December 31, 2016 | | | | | | | | | Allowances deducted from assets | | | | | | | | | Deferred tax assets - valuation allowance | | $ | 301,896 |
| | $ | 24,521 |
| | $ | — |
| | $ | 326,417 |
| Reserve for parts inventory obsolescence | | 2,760 |
| | 349 |
| | — |
| | 3,109 |
| Allowance for doubtful accounts and other receivables | | 407 |
| | — |
| | (407 | ) | | — |
| Total allowances deducted from assets | | $ | 305,063 |
| | $ | 24,870 |
| | $ | (407 | ) | | $ | 329,526 |
| | | | | | | | | | For the Year Ended December 31, 2017 | | | | | | | | | Allowances deducted from assets | | | | | | | | | Deferred tax assets - valuation allowance | | $ | 326,417 |
| | $ | — |
| | $ | (104,710 | ) | | $ | 221,707 |
| Reserve for parts inventory obsolescence | | 3,109 |
| | 1,073 |
| | — |
| | 4,182 |
| Allowance for doubtful accounts and other receivables | | — |
| | 865 |
| | — |
| | 865 |
| Total allowances deducted from assets | | $ | 329,526 |
| | $ | 1,938 |
| | $ | (104,710 | ) | | $ | 226,754 |
| | | | | | | | | | For the Year Ended December 31, 2018 | | | | | | | | | Allowances deducted from assets | | | | | | | | | Deferred tax assets - valuation allowance | | $ | 221,707 |
| | $ | — |
| | $ | (3,330 | ) | | $ | 218,377 |
| Reserve for parts inventory obsolescence | | 4,182 |
| | 15 |
| | (2,454 | ) | | 1,743 |
| Allowance for doubtful accounts and other receivables | | 865 |
| | 100 |
| | (500 | ) | | 465 |
| Total allowances deducted from assets | | $ | 226,754 |
| | $ | 115 |
| | $ | (6,284 | ) | | $ | 220,585 |
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