Accrued Expenses and Other Current Liabilities (Tables)

12 Months Ended

Dec. 31, 2021

Payables and Accruals [Abstract]

Schedule of Accrued Expenses and Other Current Liabilities

Accrued expenses and other current liabilities consisted of the following: 

	December 31,
	2021		2020
Wages and benefits	$	52,310	$	40,330
Workers’ compensation	10,582		10,355
Black lung	7,235		6,784
Taxes other than income taxes	30,734		21,540
Current portion of asset retirement obligations	32,159		24,990
Accrued interest and fees	14,489		15,902
Deferred revenue	—		13,197
Freight accrual	15,085		2,610
Other	12,013		4,698
Total accrued expenses and other current liabilities	$	174,607	$	140,406