Accrued Liabilities

12 Months Ended

Dec. 31, 2012

Accrued Liabilities, Current [Abstract]

Accrued Liabilities

Accrued Liabilities

Accrued liabilities consist of the following:

	As of December 31,
	2012		2011
Compensation and benefits	$	40,132	$	45,418
Customer advances	389		1,077
Deferred revenue	27,668		18,916
Taxes, other than income	11,015		9,749
Liabilities assumed in business combinations	2,069		6,132
Accrued contract costs	11,663		11,461
Accrued interest	14,706		8,694
Other	51,375		43,234
	$	159,017	$	144,681