v3.3.1.900

Related Party Transactions - NGHC (Details) - USD ($) |  |  |  | 12 Months Ended
--- | --- | --- | --- | ---
Apr. 01, 2015 | Oct. 01, 2012 | Mar. 01, 2010 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Related Party Transaction [Line Items] |  |  |  |  |  |
Premiums earned |  |  |  | $ 2,429,069,000 | $ 2,251,743,000 | $ 2,000,887,000
National General Holdings Corp. | NGHC Quota Share Reinsurance Agreement |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Percent participation in quota share by subsidiary |  |  | 50.00% |  |  |
Percent of net premiums of personal lines business received by subsidiary |  |  | 25.00% |  |  |
Percent of net losses related to premiums of personal lines business assumed by reinsurers |  |  | 25.00% |  |  |
Commission rate, percent of ceded written premiums |  | 32.00% | 32.50% |  |  |
Commission rate, adjusted percent of ceded written premiums |  |  | 34.50% |  |  |
Commission rate, adjustment criteria, loss ratio ceiling |  |  | 60.00% |  |  |
Commission rate, reduced adjustment to percent of ceded written premiums |  | 30.00% | 30.50% |  |  |
Commission rate, adjustment criteria, loss ratio floor |  |  | 64.50% |  |  |
National General Holdings Corp. | NGHC Quota Share Reinsurance Agreement | Commissions paid |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Expenses recorded from related party transactions |  |  |  | 0 | 6,509,000 | 75,382,000
National General Holdings Corp. | NGHC Subsidiaries Reinsurance Agreement |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Reinsurance coverage limit |  |  |  | 8,825,000 | 8,900 |
Medical Excess of Loss Reinsurance Agreement | National General Holdings Corp. | NGHC Subsidiaries Reinsurance Agreement |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Liability percentage | 100.00% |  |  |  |  |
Reinsurance coverage threshold |  |  |  | 1,175,000 | 1,100,000 |
Maximum limit of liability attaching |  |  |  | 2,000,000 |  |
Premiums earned |  |  |  | $ 443,000 | $ 190,000 | $ 180,000

X
- Definition Related Party Transaction, Commission Rate, Adjusted Percent of Ceded Written Premiums + References No definition available. + Details
Name: | mhld_RelatedPartyTransactionCommissionRateAdjustedPercentOfCededWrittenPremiums
Namespace Prefix: | mhld_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Related Party Transaction, Commission Rate, Adjustment Criteria, Loss Ratio Ceiling + References No definition available. + Details
Name: | mhld_RelatedPartyTransactionCommissionRateAdjustmentCriteriaLossRatioCeiling
Namespace Prefix: | mhld_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Related Party Transaction, Commission Rate, Adjustment Criteria, Loss Ratio Floor + References No definition available. + Details
Name: | mhld_RelatedPartyTransactionCommissionRateAdjustmentCriteriaLossRatioFloor
Namespace Prefix: | mhld_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Related Party Transaction, Commission Rate, Percent of Ceded Written Premiums + References No definition available. + Details
Name: | mhld_RelatedPartyTransactionCommissionRatePercentOfCededWrittenPremiums
Namespace Prefix: | mhld_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Related Party Transaction, Commission Rate, Reduced Adjustment Adjusted Percent of Ceded Written Premiums + References No definition available. + Details
Name: | mhld_RelatedPartyTransactionCommissionRateReducedAdjustmentAdjustedPercentOfCededWrittenPremiums
Namespace Prefix: | mhld_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Related Party Transaction, Liability Percentage + References No definition available. + Details
Name: | mhld_RelatedPartyTransactionLiabilityPercentage
Namespace Prefix: | mhld_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Related Party Transaction, Maximum Limit of Liability Attaching + References No definition available. + Details
Name: | mhld_RelatedPartyTransactionMaximumLimitOfLiabilityAttaching
Namespace Prefix: | mhld_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Related Party Transaction, Percent of Net Losses Related To Premiums of Personal Lines Business Assumed by Reinsurers + References No definition available. + Details
Name: | mhld_RelatedPartyTransactionPercentOfNetLossesRelatedToPremiumsOfPersonalLinesBusinessAssumedByReinsurers
Namespace Prefix: | mhld_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Related Party Transaction, Percent of Net Premiums of Personal Lines Business Received by Subsidiary + References No definition available. + Details
Name: | mhld_RelatedPartyTransactionPercentOfNetPremiumsOfPersonalLinesBusinessReceivedBySubsidiary
Namespace Prefix: | mhld_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Related Party Transaction, Percent Participation in Quota Share by Subsidiary + References No definition available. + Details
Name: | mhld_RelatedPartyTransactionPercentParticipationInQuotaShareBySubsidiary
Namespace Prefix: | mhld_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Related Party Transaction, Reinsurance Coverage Limit + References No definition available. + Details
Name: | mhld_RelatedPartyTransactionReinsuranceCoverageLimit
Namespace Prefix: | mhld_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Related Party Transaction, Reinsurance Coverage Threshold + References No definition available. + Details
Name: | mhld_RelatedPartyTransactionReinsuranceCoverageThreshold
Namespace Prefix: | mhld_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount, after premiums ceded to other entities and premiums assumed by the entity, of premiums earned. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.1) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 605 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547 Reference 3: 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(c)) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 235 -Section S99 -Paragraph 2 -Subparagraph (SX 210.12-17) -URI http://asc.fasb.org/extlink&oid=34713774&loc=d3e574992-122915 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 1 -Article 7 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 17 -Article 12 + Details
Name: | us-gaap_PremiumsEarnedNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 + Details
Name: | us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
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_RelatedPartyTransactionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=mhld_NationalGeneralHoldingsCorp.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TypeOfArrangementAxis=mhld_NGHCQuotaShareReinsuranceAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | mhld_RelatedPartyTransactionByTypeAxis=mhld_CommissionExpenseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TypeOfArrangementAxis=mhld_NGHCSubsidiariesReinsuranceAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionAxis=mhld_MedicalExcessofLossReinsuranceAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |