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Accounts Payable and Accrued Liabilities (Tables) | 12 Months Ended
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Dec. 31, 2018
Accounts Payable and Accrued Liabilities |
Summary of accrued expenses and other current liabilities | The following is a summary of accrued expenses and other current liabilities at December 31 (in thousands):
|  | December 31, |  | December 31,
|  | 2018 |  | 2017
Payroll and related employee benefits |  | $ | 60,509 |  | $ | 45,708
Insurance, including self-insurance reserves |  |  | 41,379 |  |  | 21,391
Corporate income taxes and other taxes |  |  | 5,040 |  |  | 2,843
Other |  |  | 10,599 |  |  | 6,085
|  | $ | 117,527 |  | $ | 76,027

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