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Noncontrolling Interests
3 Months Ended
Mar. 31, 2012
Noncontrolling Interest [Abstract]  
Non controlling interests
Noncontrolling Interests
We own some of our animal hospitals in partnerships with noncontrolling interest holders. We consolidate our partnerships in our consolidated financial statements because our ownership interest in these partnerships is equal to or greater than 50.1% and we control these entities. We record noncontrolling interest in income of subsidiaries equal to our partners’ percentage ownership of the partnerships’ income. We also record changes in the redemption value of our redeemable noncontrolling interests in net income attributable to noncontrolling interests in our condensed, consolidated income statements. We reflect our noncontrolling partners’ cumulative share in the equity of the respective partnerships as either noncontrolling interests in equity, mandatorily redeemable noncontrolling interests in other liabilities or redeemable noncontrolling interests in temporary equity (mezzanine).
 
a.
Mandatorily Redeemable Noncontrolling Interests
The terms of some of our partnership agreements require us to purchase the partner’s equity in the partnership in the event of the partner’s death. We report these redeemable noncontrolling interests at their estimated redemption value and classify them as liabilities due to the certainty of the related event. We recognize redemption value changes in the obligation in interest expense. At March 31, 2012 and December 31, 2011, these liabilities were $9.4 million and $3.1 million, respectively, and are included in other liabilities in our consolidated balance sheets.
 
b.
Redeemable Noncontrolling Interests
We also enter into partnership agreements whereby the minority partner is issued certain “put” rights. These rights are normally exercisable at the sole discretion of the minority partner. We report these redeemable noncontrolling interests at their estimated redemption value and classify them in temporary equity (mezzanine). We recognize changes in the obligation in net income attributable to noncontrolling interests.

12.
Noncontrolling Interests, continued
The following table provides a summary of redeemable noncontrolling interests (in thousands):
 
 
Income
Statement
Impact
 
Redeemable
Noncontrolling
Interests
Balance as of December 31, 2010
 
 
$
5,799

Noncontrolling interest
$
193

 
 
Redemption value change
402

 
595

Formation of noncontrolling interests
 
 

Distribution to noncontrolling interests
 
 
(176
)
Balance as of March 31, 2011
 
 
$
6,218

Balance as of December 31, 2011
 
 
$
6,964

Noncontrolling interest
$
210

 
 
Redemption value change
(34
)
 
176

Formation of noncontrolling interests
 
 

Distribution to noncontrolling interests
 
 
(190
)
Balance as of March 31, 2012
 
 
$
6,950