XML 73 R49.htm IDEA: XBRL DOCUMENT v2.4.0.8
Accrued Liabilities (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Accrued Liabilities [Abstract]    
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