Accrued Liabilities (Tables)

12 Months Ended

Dec. 31, 2011

Accrued Liabilities [Abstract]

Summary Of Accrued Liabilities

	2011		2010
Accrued wages, bonuses and commissions	$	16,971	$	11,762
Other accrued liabilities		6,510		6,367
Accrued health claims		1,270		1,304
	$	24,751	$	19,433