XML 48 R35.htm IDEA: XBRL DOCUMENT
v3.8.0.1

INVESTMENTS (Equity Securities) (Details) - USD ($) $ in Thousands | Mar. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Investment [Line Items] |  |
Cost | $ 374,091 | $ 552,867
Gross Unrealized Gains | 63,142 | 84,527
Gross Unrealized Losses | (1,491) | (1,883)
Equity securities | 435,742 | 635,511
Common stocks |  |
Investment [Line Items] |  |
Cost | 23,251 | 22,836
Gross Unrealized Gains | 1,668 | 3,412
Gross Unrealized Losses | (977) | (590)
Equity securities | 23,942 | 25,658
Exchange-traded funds |  |
Investment [Line Items] |  |
Cost | 211,301 | 356,252
Gross Unrealized Gains | 51,843 | 71,675
Gross Unrealized Losses | (514) | (294)
Equity securities | 262,630 | 427,633
Bond mutual funds |  |
Investment [Line Items] |  |
Cost | 139,539 | 173,779
Gross Unrealized Gains | 9,631 | 9,440
Gross Unrealized Losses | 0 | (999)
Equity securities | $ 149,170 | $ 182,220

X
- Definition Equity Securities, FV-NI + References No definition available. + Details
Name: | axs_EquitySecuritiesFvNi
Namespace Prefix: | axs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Equity Securities, Fv-Ni, Cost + References No definition available. + Details
Name: | axs_EquitySecuritiesFvNiCost
Namespace Prefix: | axs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Equity Securities, FV-NI, Gross Unrealized Gain + References No definition available. + Details
Name: | axs_EquitySecuritiesFvNiGrossUnrealizedGain
Namespace Prefix: | axs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Equity Securities, FV-NI, Gross Unrealized Loss + References No definition available. + Details
Name: | axs_EquitySecuritiesFvNiGrossUnrealizedLoss
Namespace Prefix: | axs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Line items represent reporting 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 Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 12 -Sentence Column A + Details
Name: | invest_InvestmentLineItems
Namespace Prefix: | invest_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_CommonStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_ExchangeTradedFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=axs_NonUnitedStatesBondMutualFundMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |