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Related Party Transactions (Details) (RICs [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
RICs [Member]
Related Party Transaction [Line Items]
Investment Advisory and Administration Fees	$ 422,825	$ 380,645	$ 364,602
Distribution and Servicing Fees	47,988	37,827	39,017
Brokerage commissions revenue	$ 620	$ 1,213	$ 2,772

X

- Definition

Amount of commission revenue from buying and selling securities on behalf of customers.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 940

-SubTopic 20

-Section 05

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6475471&loc=d3e40544-110947



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 225

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-04.13(a),(b))

-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

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X

- Definition

Amount of fees from providing distribution and shareholder services. Distribution services include, but are not limited to, marketing and selling fund shares, advertising, printing and mailing of prospectuses and sales literature to investors. Shareholder services include, but are not limited to, answering shareholder inquiries and providing shareholders with investment information.

+ References

No definition available.

+ Details

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X

- Definition

Amount of fees earned from providing investment advice and research to customers.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 225

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-04.13(a),(d))

-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

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X

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