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Fair Value Measurements (Company's Portfolio of Other Investments Measured Using Net Asset Valuations) (Details) $ in Thousands | Dec. 31, 2017 USD ($)
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Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |
Fair Value | $ 214,318
Unfunded Commitments | 380,483
Private equity investments |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |
Fair Value | 196,220
Unfunded Commitments | 356,525
Senior secured bank loan funds |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |
Fair Value | 17,574
Unfunded Commitments | 23,958
Hedge funds |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |
Fair Value | 524
Unfunded Commitments | $ 0

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- Definition Fair value of investment in certain entities that calculate net asset value per share. Includes, but is not limited to, by unit, membership interest, or other ownership interest. Investment includes, but is not limited to, investment in certain hedge funds, venture capital funds, private equity funds, real estate partnerships or funds. Excludes measurement of net asset value as estimate of fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 6A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66048111&loc=SL6742756-110258 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition The amount of unfunded commitments for which the entity is obligated, to those certain investments for which net asset value per share is calculated (including by unit, membership interest, or other equity (ownership interest) unit measure) (alternative investments). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 6A -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=66048111&loc=SL6742756-110258 + Details
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