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Special Charges (Notes)	3 Months Ended
Special Charges (Notes)	Sep. 30, 2011
Notes to Financial Statements [Abstract]
Special charges	Special Charges During the three and six months ended September 30, 2010, the Company incurred $0.6 million and $1.0 million, respectively, of severance-related and office closing costs associated with the acquisition of SST. There were no such charges in the three or six months ended September 30, 2011.