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Schedule I. Summary of Investments Other Than Investments in Related Parties (Details) $ in Thousands | Dec. 31, 2016 USD ($)
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Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items] |
Market Value | $ 9,316,968
Amount at which shown in the Balance Sheet | 9,316,968
U.S. treasuries |
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items] |
Amortized Cost | 2,635,282
Market Value | 2,617,894
Amount at which shown in the Balance Sheet | 2,617,894
Agencies |
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items] |
Amortized Cost | 91,905
Market Value | 90,972
Amount at which shown in the Balance Sheet | 90,972
Municipal |
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items] |
Amortized Cost | 524,559
Market Value | 519,069
Amount at which shown in the Balance Sheet | 519,069
Non-U.S. government (Sovereign debt) |
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items] |
Amortized Cost | 342,108
Market Value | 333,224
Amount at which shown in the Balance Sheet | 333,224
Non-U.S. government-backed corporate |
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items] |
Amortized Cost | 137,024
Market Value | 133,300
Amount at which shown in the Balance Sheet | 133,300
Corporate |
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items] |
Amortized Cost | 1,868,125
Market Value | 1,877,243
Amount at which shown in the Balance Sheet | 1,877,243
Agency mortgage-backed |
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items] |
Amortized Cost | 471,235
Market Value | 462,493
Amount at which shown in the Balance Sheet | 462,493
Non-agency mortgage-backed |
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items] |
Amortized Cost | 252,829
Market Value | 258,944
Amount at which shown in the Balance Sheet | 258,944
Commercial mortgage-backed |
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items] |
Amortized Cost | 409,682
Market Value | 409,747
Amount at which shown in the Balance Sheet | 409,747
Asset-backed |
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items] |
Amortized Cost | 187,941
Market Value | 188,358
Amount at which shown in the Balance Sheet | 188,358
Fixed maturity investments |
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items] |
Amortized Cost | 6,920,690
Market Value | 6,891,244
Amount at which shown in the Balance Sheet | 6,891,244
Short term investments |
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items] |
Market Value | 1,368,379
Amount at which shown in the Balance Sheet | 1,368,379
Equity investments |
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items] |
Market Value | 383,313
Amount at which shown in the Balance Sheet | 383,313
Other investments |
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items] |
Market Value | 549,805
Amount at which shown in the Balance Sheet | 549,805
Investments in other ventures, under equity method |
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items] |
Market Value | 124,227
Amount at which shown in the Balance Sheet | $ 124,227

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- Definition This element represents the carrying (reported) amount of the entity's investments as of the balance sheet date. This amount may represent the individual investment's or group of similar investments' original cost, fair value, or such other amount at which the investment is shown in the entity's balance sheet. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 7 -Subparagraph (SX 210.12-15) -URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611379-123010 + Details
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- Definition This item represents the original cost of the entity's investments including investments in equity securities and, as to fixed maturities, original cost reduced by repayments and adjusted for amortization of premiums or accrual of discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 7 -Subparagraph (SX 210.12-15) -URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611379-123010 + Details
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- Definition This item represents the reported amount of the entity's investments measured at fair value. Fair value is the price that would be received to sell an investment in an orderly transaction between market participants at the balance sheet [measurement] date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 7 -Subparagraph (SX 210.12-15) -URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611379-123010 + Details
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