Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2012

Fair Value Disclosures [Abstract]

Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis

The assets and liabilities measured at fair value on a recurring basis are as follows (in thousands):

	As of September 30, 2012
	Fair Value Measurements Using								Total
	Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs			Significant Unobservable Inputs
	(Level 1)		(Level 2)			(Level 3)
Interest rate contracts	$	—	$	(403	)	$	—		$	(403	)
Contingent consideration to be paid in cash for the acquisitions	$	—	$	—		$	(8,408	)	$	(8,408	)
	As of December 31, 2011
	Fair Value Measurements Using								Total
	Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs			Significant Unobservable Inputs
	(Level 1)		(Level 2)			(Level 3)
Interest rate contracts	$	—	$	(608	)	$	—		$	(608	)
Contingent consideration to be paid in cash for the acquisitions	$	—	$	—		$	(9,856	)	$	(9,856	)

Schedule of Reconciliations of Liabilities Measured and Carried at Fair Value on Recurring Basis, with Significant Unobservable Inputs

Reconciliations of liabilities measured and carried at fair value on a recurring basis with the use of significant unobservable inputs (Level 3) are as follows (in thousands):

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2012			2011			2012			2011
Contingent consideration for acquisitions
Balance at beginning of period	$	(9,317	)	$	(7,866	)	$	(9,856	)	$	(3,700	)
Additions for acquisitions	—			(3,431		)	—			(10,346		)
Payments on contingent consideration	—			—			—			1,731
Settlements of contingent consideration	—			—			—			1,369
Fair value adjustment	1,038			62			1,408			19
Foreign currency translation adjustment	(129		)	477			40			169
Balance at end of period	$	(8,408	)	$	(10,758	)	$	(8,408	)	$	(10,758	)