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Fair Value Measurement
3 Months Ended
Mar. 31, 2016
Fair Value Disclosures [Abstract]  
Fair value measurement
4. Fair Value Measurement
Accounting guidance on fair value measurements for certain financial assets and liabilities requires that assets and liabilities carried at fair value be classified and disclosed in one of the following three categories:
Level 1 — Quoted market prices in active markets for identical assets or liabilities.
Level 2 — Observable market-based inputs or unobservable inputs that are corroborated by market data.
Level 3 — Unobservable inputs reflecting the reporting entity’s own assumptions or external inputs from inactive markets.
A financial asset’s or liability’s classification within the hierarchy is determined based on the lowest level of input that is significant to the fair value measurement.
Certain of the Company’s acquisitions contain contingent purchase obligations as described in Note 2. The contingent purchase obligation related to acquisitions is measured at fair value on a recurring basis, according to the valuation techniques the Company used to determine fair value. Changes to the fair value are recognized as income or expense within other operating expenses in the condensed consolidated statements of operations. In measuring the fair value of the contingent purchase obligation, the Company used an income approach that considers the expected future earnings of the acquired businesses, for the varying performance periods, based on historical performance and the resulting contingent payments, discounted at a risk-adjusted rate.
The following table presents information, as of March 31, 2016 and December 31, 2015, about the Company’s financial liabilities (in thousands):
 
March 31, 2016
 
Level 1
 
Level 2
 
Level 3
 
Fair Value
Contingent purchase obligation related to acquisitions
$

 
$

 
$
4,913

 
$
4,913

Total liabilities at fair value
$

 
$

 
$
4,913

 
$
4,913

 
December 31, 2015
 
Level 1
 
Level 2
 
Level 3
 
Fair Value
Contingent purchase obligation related to acquisitions
$

 
$

 
$
4,913

 
$
4,913

Total liabilities at fair value
$

 
$

 
$
4,913

 
$
4,913


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, 2016 and 2015 (in thousands):
 
 
Three Months Ended
 
 
March 31,
 
 
2016
 
2015
Balance, beginning of period
 
$
4,913

 
$
6,842

Payments of contingent purchase obligations
 

 
(1,906
)
Interest expense
 

 
90

Adjustments to contingent purchase obligations (1)
 

 
(244
)
Balance, end of period
 
$
4,913

 
$
4,782

(1)
Adjustments to contingent purchase obligations are reported in other operating expenses in the condensed consolidated statements of operations.