Other Accrued Liabilities (Tables)

12 Months Ended

Dec. 31, 2011

Other Accrued Liabilities [Abstract]

Other Accrued Liabilities

	As of December 31,
	2011		2010
Deferred revenue	$	7,025	$	8,617
Accrued health insurance		5,553		4,970
Deferred rent		3,626		3,456
Customer deposits		2,281		2,966
Accrued consulting fees		2,886		2,760
Accrued lab service rebates		332		2,535
Holdbacks and earn-outs		2,250		2,447
Other		20,015		18,018
	$	43,968	$	45,769