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Recent Accounting Pronouncements (Details)	9 Months Ended
	Sep. 30, 2011 Customer step year statement
Recent Accounting Pronouncements
Number of steps in quantitative goodwill impairment test	2
Number of statements under alternative one	1
Number of statements under alternative two	2

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- Definition

Represents the number of statements presented by the entity under the first alternative per recently issued accounting standards.

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X

- Definition

Represents the number of statements presented by the entity under the second alternative per recently issued accounting standards.

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X

- Definition

Represents the number of steps in quantitative goodwill impairment test.

+ Details

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