Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

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+ Details

- Definition

Loss recognized during the period that results from the write-down of goodwill after comparing the implied fair value of reporting unit goodwill with the carrying amount of that goodwill. Goodwill is assessed at least annually for impairment.

+ References

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+ Details

Fair Value Measurements (Details 2) (USD $) In Thousands	9 Months Ended					3 Months Ended	9 Months Ended
Fair Value Measurements (Details 2) (USD $) In Thousands	Sep. 30, 2011	Sep. 30, 2010	Dec. 31, 2010	Sep. 30, 2011 Non-recurring basis Total U.S. Operations	Sep. 30, 2011 Non-recurring basis Level 3 U.S. Operations	Jun. 30, 2011 U.S. Operations	Sep. 30, 2011 U.S. Operations	Mar. 31, 2011 U.S. Operations	Dec. 31, 2010 U.S. Operations
Fair value measurements
Goodwill - U.S. Operations				$ 245,118	$ 245,118
Total				245,118	245,118
Goodwill impairment	225,035	5,375				225,000	225,035
Goodwill	$ 274,284		$ 468,479			$ 245,100	$ 245,098	$ 470,100	$ 439,294