Accrued Liabilities (Tables)

6 Months Ended

Jun. 30, 2014

Accrued Liabilities [Abstract]

Components of Accrued Liabilities

The components of accrued liabilities are as follows (in thousands):

	June 30, 2014		December 31, 2013
Compensation and benefits	$	126,470	$	130,455
Medical insurance and workers’ compensation	25,143		26,399
Franchise, property, sales and use taxes	21,884		20,232
Customer volume discounts and rebates	11,268		11,436
Environmental liabilities and asset retirement obligations	7,465		7,812
Severance	3,315		8,172
Legal contingencies	905		1,000
Other	10,864		8,552
Total	$	207,314	$	214,058