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Subsequent event	12 Months Ended
Subsequent event	Dec. 31, 2011
Subsequent event [Abstract]
Subsequent event	Note 18: Subsequent event In February 2012, we modified the terms of our $200,000 credit facility (see Note 13). We extended the term of the agreement to February 2017 and lowered the commitment fee to a range of 0.20% to 0.45%, based on our leverage ratio. No changes were made to the financial covenants included in the credit agreement.