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Accounts Payable and Other Accrued Liabilities
9 Months Ended
Sep. 30, 2018
Payables and Accruals [Abstract]  
Accounts Payable and Other Accrued Liabilities Accounts Payable and Other Accrued Liabilities
Accounts payable and other accrued liabilities consisted of the following (in thousands):
September 30, 2018December 31, 2017
Accounts payable $24,347 $21,591 
Accrued liabilities 13,419 13,282 
Total Accounts payable and other accrued liabilities $37,766 $34,873 
Our accounts payable balance includes vendor and independent contractor payables. Our accrued liabilities balance includes the current portion of the deferred compensation plans liability, contract liabilities from contracts with customers (such as rebates) and other accrued liabilities.