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SCHEDULE II – VALUATION AND QUALIFYING ACCOUNTS (Tables) | 12 Months Ended
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Dec. 31, 2020
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] |
SCHEDULE II-VALUATION AND QUALIFYING ACCOUNTS |
|  | Allowance for Expected Credit Losses |
(in thousands) |  | Balance at Beginning of Year |  |  | Adoption of ASC 326 |  |  | Charged to Costs and Expenses |  |  | Net (Deductions) Recoveries |  |  | Balance at End of Year |
2020 |  | $ | 19,658 |  |  | $ | (3,330 | ) |  | $ | 17,536 |  |  | $ | (13,779 | ) |  | $ | 20,085 |
2019 |  | $ | 16,666 |  |  | $ | — |  |  | $ | 15,145 |  |  | $ | (12,153 | ) |  | $ | 19,658 |
2018 |  | $ | 14,706 |  |  | $ | — |  |  | $ | 13,606 |  |  | $ | (11,646 | ) |  | $ | 16,666 |

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