Accrued Liabilities (Tables)

12 Months Ended

Dec. 31, 2018

Accrued Liabilities, Current [Abstract]

Schedule of Accrued Liabilities

	December 31, 2018		December 31, 2017
High deductible insurance	$	6,090	$	6,250
Accrued payroll	20,830		19,060
Other	21,380		24,160
Total accrued liabilities	$	48,300	$	49,470