Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2012

Fair Value Disclosures [Abstract]

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

Our financial assets and (liabilities) carried at fair value measured on a recurring basis as of December 31, 2012 and 2011, consisted of the following (in thousands):

				Fair Value Measurements Using
	Total Fair			Quoted prices in		Significant other			Significant
	Value at			active markets		observable inputs			Unobservable inputs
Description	December 31, 2012			(Level 1)		(Level 2)			(Level 3)
Interest rate swap (1)	$	(1,788	)	$	—	$	(1,788	)	$	—
				Fair Value Measurements Using
	Total Fair			Quoted prices in		Significant other			Significant
	Value at			active markets		observable inputs			Unobservable inputs
Description	December 31, 2011			(Level 1)		(Level 2)			(Level 3)
Marketable securities (2)	$	2,798		$	2,798	$	—		$	—

(1)    The fair value of the interest rate swap is determined based on forward yield curves.

(2)    Our marketable securities, which consist entirely of available-for-sale equity securities, are valued using market prices in active markets. Level 1 instrument valuations are obtained from real-time quotes for transactions in active exchange markets involving identical assets.

Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation

Changes in the fair value of our contingent liability during the years ended December 31, 2012 and 2011 consisted of the following (in thousands):

	2012			2011
Beginning balance	$	1,290		$	—
Contingent consideration liability recorded as the result of acquisitions (see Note 2)	4,704			1,270
Initial purchase price adjustments finalized over the period (see Note 2)	280			—
Fair value adjustments recorded to expense during the period	480			20
Contingent payments made	(57		)	—
Ending balance	$	6,697		$	1,290

Fair Value Inputs, Liabilities, Quantitative Information

The recurring Level 3 measurement of our contingent consideration liability includes the following significant unobservable inputs at December 31, 2012 and 2011 (amount in thousands):

Contingent consideration liability	Fair value at December 31, 2012		Valuation technique	Unobservable inputs	Range
Revenue-based payments	$	6,370	Discounted cash flow	Discount rate	10% - 14.5%
				Probability of milestone payment	90%
				Projected year of payments	2013-2028
Other payments	327		Discounted cash flow	Discount rate	4.5%
				Probability of milestone payment	100%
				Projected year of payments	2013-2015
Contingent consideration liability	Fair value at December 31, 2011		Valuation technique	Unobservable inputs	Range
Revenue-based payments	$	1,290	Discounted cash flow	Discount rate	10% - 14.5%
				Probability of milestone payment	90%
				Projected year of payments	2012-2028