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Special Charges (Notes)	3 Months Ended
Special Charges (Notes)	Jun. 30, 2011
Notes to Financial Statements [Abstract]
Special charges	Special Charges During the three months ended June 30, 2010, the Company incurred $0.5 million of severance-related costs associated with the acquisition of SST, all of which were paid during the quarter. There were no such charges in the three months ended June 30, 2011.