Accounts Payable and Accrued Liabilities (Tables)

12 Months Ended

Dec. 31, 2017

Accounts Payable and Accrued Liabilities [Abstract]

Schedule of Accounts Payable and Accrued Liabilities

		2017		2016
Accounts payable	$	4,008	$	4,829
Goods received not yet invoiced		5,574		3,072
Accrued property taxes		2,751		2,992
Workers' compensation reserve and IBNR		2,969		2,658
Other		5,813		6,367
Total accounts payable and accrued liabilities	$	21,115	$	19,918