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Related Party Transactions (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Related Party Transactions [Abstract] |  |  |
Investment Advisory and Administration Fees | $ 380,645 | $ 364,602 | $ 354,341
Distribution and Servicing Fees | 37,827 | 39,017 | 36,007
Brokerage commissions revenue | $ 1,213 | $ 2,772 | $ 4,875

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- 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 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-BRD -Paragraph 9, 51, 52 -IssueDate 2006-05-01 -Chapter 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Point-of-sale fee revenues (such as mutual fund front-end sales loads) and asset-based fee revenues (such as 12b-1 distribution and shareholder service fees) that are generally based on a contractual percentage of assets. Reported amounts also include fees earned from providing client or shareholder servicing, record keeping, or administrative services, and fees charged to cover certain types of expenses, including fund accounting fees, SEC filings and other maintenance costs. + References No definition available. + Details
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- Definition Fees earned for providing investment advice and research to customers. Such services may include the investment management of mutual funds and separate accounts. + 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-BRD -Paragraph 9, 51, 59, 80 -IssueDate 2006-05-01 -Chapter 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Details
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