Acquisitions Acquisitions (Details) (USD $)						9 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013	Feb. 28, 2014 GTRUST Financial Corporation [Member]	Apr. 30, 2014 MBM Advisors [Member]	Sep. 30, 2014 Series of Individually Immaterial Business Acquisitions [Member]
Business Acquisition [Line Items]
Assets Under Management at time of acquisition				$ 631,000,000	$ 1,300,000,000
Consideration Transferred						27,000,000
Cash Paid for Acquisitions						23,000,000
Contingent Consideration Recognized in Acquisitions						4,000,000
Identifiable Intangible Assets Recognized Through Acquisitions						14,000,000
Goodwill Recognized Through Acquisitions	$ 377,780,000	$ 359,759,000	$ 359,759,000			$ 18,000,000