XML 51 R40.htm IDEA: XBRL DOCUMENT
v3.7.0.1

INVESTMENTS (Details 7) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016
Net Investment Income [Line Items] |  |  |  |
Gross investment income | $ 112,894 | $ 98,927 | $ 218,752 | $ 156,495
Investment expenses | (6,831) | (7,197) | (14,024) | (15,599)
Net investment income | 106,063 | 91,730 | 204,728 | 140,896
Fixed Maturities [Member] |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Gross investment income | 78,218 | 77,621 | 155,625 | 153,596
Other Investments [Member] |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Gross investment income | 23,639 | 14,401 | 42,601 | (12,477)
Equity Securities [Member] |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Gross investment income | 4,347 | 3,065 | 7,825 | 8,210
Mortgage loans [Member] |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Gross investment income | 2,597 | 1,807 | 5,074 | 3,492
Cash And Cash Equivalents [Member] |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Gross investment income | 3,433 | 1,868 | 6,529 | 3,303
Short-term Investments [Member] |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Gross investment income | $ 660 | $ 165 | $ 1,098 | $ 371

X
- Definition The net gain or loss (both realized and unrealized) related to investments in certain entities that calculate net asset value per share and the amount after accretion (amortization) of discount (premium), of interest income and dividend income on nonoperating securities. + References No definition available. + Details
Name: | axs_InvestmentIncomeForInvestmentsAndCashAndCashEquivalents
Namespace Prefix: | axs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The net gain or loss (both realized and unrealized) related to investments in certain entities that calculate net asset value per share and the amount after accretion (amortization) of discount (premium) of interest income and dividend income on nonoperating securities, net of investment expense. + References No definition available. + Details
Name: | axs_InvestmentIncomeNetForInvestmentsAndCashAndCashEquivalents
Namespace Prefix: | axs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of expenses related to the generation of investment income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.9) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.2) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 + Details
Name: | us-gaap_InvestmentIncomeInvestmentExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- 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
Name: | us-gaap_ScheduleOfInvestmentIncomeReportedAmountsByCategoryLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_FixedMaturitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=axs_AlternativeInvestmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_EquitySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_MortgagesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_CashAndCashEquivalentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_ShortTermInvestmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |