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Special Charges (Notes)	6 Months Ended
Special Charges (Notes)	Sep. 30, 2015
Other Nonrecurring (Income) Expense [Abstract]
Special charges	Special Charges The Company incurred special charges related to severance, office closing and other costs associated with its acquisition activity of $6.6 million and $8.2 million for the three and six months ended September 30, 2015, respectively, and $0.8 million and $1.1 million for the three and six months ended September 30, 2014, respectively.