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Fair Value Measurement (Tables)
3 Months Ended
Mar. 31, 2013
Fair Value Disclosures [Abstract]  
Financial liabilities measured at fair value on a recurring basis
 
March 31, 2013
 
Level 1
 
Level 2
 
Level 3
 
Fair Value
Contingent purchase price related to acquisitions
$

 
$

 
$
21,613

 
$
21,613

Total liabilities at fair value
$

 
$

 
$
21,613

 
$
21,613

 
December 31, 2012
 
Level 1
 
Level 2
 
Level 3
 
Fair Value
Contingent purchase price related to acquisitions
$

 
$

 
$
20,907

 
$
20,907

Total liabilities at fair value
$

 
$

 
$
20,907

 
$
20,907

Schedule of reconciliation of beginning and ending Level 3 financial liability balance
The table below sets forth a reconciliation of the Company’s beginning and ending Level 3 financial liability balance for the three months ended March 31, 2013 and twelve months ended December 31, 2012 (in thousands):
 
March 31, 2013
 
December 31, 2012
Balance, beginning of period
$
20,907

 
$
3,015

Earnouts and adjustments related to acquisitions
430

 
17,733

Payment of contingent purchase obligations

 
(284
)
Adjustment to contingent purchase obligation
276

 
443

Balance, end of period
$
21,613

 
$
20,907