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Related Party Transactions - AmTrust (Details)
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3 Months Ended | 3 Months Ended | 0 Months Ended | 3 Months Ended | 0 Months Ended | 3 Months Ended | 0 Months Ended | 3 Months Ended | 0 Months Ended | 0 Months Ended | 3 Months Ended | 3 Months Ended | 0 Months Ended | 3 Months Ended | 0 Months Ended | 3 Months Ended | 0 Months Ended | |||||||||||||||||||||||||||||||||||||||||
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Mar. 31, 2014
USD ($)
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Dec. 31, 2013
USD ($)
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Mar. 31, 2014
AmTrust Financial Services, Inc. [Member]
USD ($)
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Dec. 31, 2013
AmTrust Financial Services, Inc. [Member]
USD ($)
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Mar. 31, 2014
AmTrust Financial Services, Inc. [Member]
Quota Share Reinsurance Agreements [Member]
Commissions Paid [Member]
USD ($)
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Mar. 31, 2013
AmTrust Financial Services, Inc. [Member]
Quota Share Reinsurance Agreements [Member]
Commissions Paid [Member]
USD ($)
|
Mar. 07, 2013
AmTrust Financial Services, Inc. [Member]
AmTrust Quota Share Reinsurance Agreement [Member]
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Jan. 02, 2013
AmTrust Financial Services, Inc. [Member]
AmTrust Quota Share Reinsurance Agreement [Member]
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Dec. 31, 2011
AmTrust Financial Services, Inc. [Member]
AmTrust Quota Share Reinsurance Agreement [Member]
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Apr. 01, 2011
AmTrust Financial Services, Inc. [Member]
AmTrust Quota Share Reinsurance Agreement [Member]
|
Jan. 01, 2010
AmTrust Financial Services, Inc. [Member]
AmTrust Quota Share Reinsurance Agreement [Member]
|
Feb. 09, 2009
AmTrust Financial Services, Inc. [Member]
AmTrust Quota Share Reinsurance Agreement [Member]
USD ($)
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Jun. 11, 2008
AmTrust Financial Services, Inc. [Member]
AmTrust Quota Share Reinsurance Agreement [Member]
USD ($)
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Jun. 01, 2008
AmTrust Financial Services, Inc. [Member]
AmTrust Quota Share Reinsurance Agreement [Member]
USD ($)
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Jul. 01, 2007
AmTrust Financial Services, Inc. [Member]
AmTrust Quota Share Reinsurance Agreement [Member]
USD ($)
|
Jan. 02, 2013
AmTrust Financial Services, Inc. [Member]
AmTrust Quota Share Reinsurance Agreement [Member]
Minimum [Member]
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Jan. 02, 2013
AmTrust Financial Services, Inc. [Member]
AmTrust Quota Share Reinsurance Agreement [Member]
Maximum [Member]
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Jan. 02, 2012
AmTrust Financial Services, Inc. [Member]
AmTrust European Hospital Liability Quota Share Agreement [Member]
EUR (€)
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Apr. 01, 2011
AmTrust Financial Services, Inc. [Member]
AmTrust European Hospital Liability Quota Share Agreement [Member]
EUR (€)
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Sep. 01, 2010
AmTrust Financial Services, Inc. [Member]
AmTrust Technology Reinsurance Agreement [Member]
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Mar. 31, 2014
AmTrust Financial Services, Inc. [Member]
AmTrust Technology Reinsurance Agreement [Member]
Commissions Paid [Member]
USD ($)
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Mar. 31, 2013
AmTrust Financial Services, Inc. [Member]
AmTrust Technology Reinsurance Agreement [Member]
Commissions Paid [Member]
USD ($)
|
Mar. 31, 2014
AmTrust Financial Services, Inc. [Member]
AmTrust Technology Reinsurance Agreement [Member]
Premiums Earned [Member]
USD ($)
|
Mar. 31, 2013
AmTrust Financial Services, Inc. [Member]
AmTrust Technology Reinsurance Agreement [Member]
Premiums Earned [Member]
USD ($)
|
Sep. 01, 2012
AmTrust Financial Services, Inc. [Member]
Southern General Agency Program Reinsurance Agreement [Member]
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Jan. 01, 2010
AmTrust Financial Services, Inc. [Member]
Southern General Agency Program Reinsurance Agreement [Member]
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Mar. 31, 2014
AmTrust Financial Services, Inc. [Member]
Southern General Agency Program Reinsurance Agreement [Member]
Commissions Paid [Member]
USD ($)
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Mar. 31, 2013
AmTrust Financial Services, Inc. [Member]
Southern General Agency Program Reinsurance Agreement [Member]
Commissions Paid [Member]
USD ($)
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Mar. 31, 2014
AmTrust Financial Services, Inc. [Member]
Southern General Agency Program Reinsurance Agreement [Member]
Premiums Earned [Member]
USD ($)
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Mar. 31, 2013
AmTrust Financial Services, Inc. [Member]
Southern General Agency Program Reinsurance Agreement [Member]
Premiums Earned [Member]
USD ($)
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Apr. 01, 2012
AmTrust Financial Services, Inc. [Member]
AmTrust NA Reinsurance Agreement [Member]
USD ($)
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Mar. 31, 2014
AmTrust Financial Services, Inc. [Member]
AmTrust NA Reinsurance Agreement [Member]
Commissions Paid [Member]
USD ($)
|
Mar. 31, 2013
AmTrust Financial Services, Inc. [Member]
AmTrust NA Reinsurance Agreement [Member]
Commissions Paid [Member]
USD ($)
|
Mar. 31, 2014
AmTrust Financial Services, Inc. [Member]
AmTrust NA Reinsurance Agreement [Member]
Premiums Earned [Member]
USD ($)
|
Mar. 31, 2013
AmTrust Financial Services, Inc. [Member]
AmTrust NA Reinsurance Agreement [Member]
Premiums Earned [Member]
USD ($)
|
Apr. 01, 2012
AmTrust Financial Services, Inc. [Member]
AmTrust NA Reinsurance Agreement [Member]
Minimum [Member]
|
Apr. 01, 2012
AmTrust Financial Services, Inc. [Member]
AmTrust NA Reinsurance Agreement [Member]
Maximum [Member]
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Mar. 31, 2014
AmTrust Financial Services, Inc. [Member]
Reinsurer Trust Assets Collateral Agreement [Member]
USD ($)
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Dec. 31, 2013
AmTrust Financial Services, Inc. [Member]
Reinsurer Trust Assets Collateral Agreement [Member]
USD ($)
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Apr. 01, 2011
AmTrust Financial Services, Inc. [Member]
Reinsurance Brokerage Agreements [Member]
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Mar. 31, 2014
AmTrust Financial Services, Inc. [Member]
Reinsurance Brokerage Agreements [Member]
Brokerage Expense [Member]
USD ($)
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Mar. 31, 2013
AmTrust Financial Services, Inc. [Member]
Reinsurance Brokerage Agreements [Member]
Brokerage Expense [Member]
USD ($)
|
Dec. 31, 2013
AmTrust Financial Services, Inc. [Member]
Reinsurance Brokerage Agreements [Member]
Brokerage Expense [Member]
USD ($)
|
Mar. 31, 2014
AmTrust Financial Services, Inc. [Member]
AmTrust NA Reinsurance Brokerage Agreements [Member]
Brokerage Expense [Member]
USD ($)
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Mar. 31, 2013
AmTrust Financial Services, Inc. [Member]
AmTrust NA Reinsurance Brokerage Agreements [Member]
Brokerage Expense [Member]
USD ($)
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Jul. 01, 2007
AmTrust Financial Services, Inc. [Member]
Asset Management Agreement [Member]
USD ($)
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Mar. 31, 2014
AmTrust Financial Services, Inc. [Member]
Asset Management Agreement [Member]
Investment Management Fees [Member]
USD ($)
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Mar. 31, 2013
AmTrust Financial Services, Inc. [Member]
Asset Management Agreement [Member]
Investment Management Fees [Member]
USD ($)
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Mar. 01, 2011
AmTrust Financial Services, Inc. [Member]
AmTrust Time Sharing Agreement [Member]
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Mar. 31, 2014
AmTrust Financial Services, Inc. [Member]
AmTrust Time Sharing Agreement [Member]
Aircraft Expenses [Member]
USD ($)
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Mar. 31, 2013
AmTrust Financial Services, Inc. [Member]
AmTrust Time Sharing Agreement [Member]
Aircraft Expenses [Member]
USD ($)
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Mar. 31, 2014
AmTrust Financial Services, Inc. [Member]
Founding Shareholders [Member]
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Jun. 06, 2013
National General Holdings Corp. [Member]
AmTrust Financial Services, Inc. [Member]
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Jun. 06, 2013
National General Holdings Corp. [Member]
Michael Karfunkel [Member]
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Jun. 06, 2013
National General Holdings Corp. [Member]
Michael Karfunkel 2005 Grantor Retained Annuity Trust [Member]
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Jun. 04, 2013
National General Holdings Corp. [Member]
Series A Preferred Stock [Member]
AmTrust Financial Services, Inc. [Member]
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Jun. 06, 2013
National General Holdings Corp. [Member]
Common Stock [Member]
AmTrust Financial Services, Inc. [Member]
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Jun. 05, 2013
National General Holdings Corp. [Member]
Common Stock [Member]
AmTrust Financial Services, Inc. [Member]
USD ($)
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| Related Party Transaction [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Ownership percentage | 59.00% | 15.40% | 15.80% | 41.40% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Shares owned | 53,054 | 12,295,430 | 42,958 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Common shares, par value | $ 0.01 | $ 0.01 | $ 0.01 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Stock split, conversion ratio | 286.22 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Number of shares issued (in shares) | 21,850,000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Percent of premiums written, net of cost of unaffiliated inuring reinsurance from related party | 100.00% | 40.00% | 100.00% | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Percent of losses with respect to current lines of business, excluding those above covered business threshold to related party | 40.00% | 40.00% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Covered business threshold | $ 5,000,000 | $ 5,000,000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Premiums and losses related to covered business to cede | 40.00% | 40.00% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Unearned premiums | 1,218,519,000 | 1,034,754,000 | 82,200,000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Commission rate, percent of ceded written premiums | 31.00% | 31.00% | 30.00% | 31.00% | 34.375% | 5.00% | 5.00% | 5.00% | 10.00% | 27.50% | ||||||||||||||||||||||||||||||||||||||||||||||||
| Commission rate, adjustment to percent of ceded written premiums | 1.00% | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Commission rate, adjusted percent of ceded written premiums | 30.00% | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Commission rate, adjustment criteria, threshold percent of specialty risk and extended warranty to covered business | 42.00% | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Commission rate, adjustment criteria 2, floor percent of specialty risk and extended warranty to covered business | 38.00% | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Commission rate, reduced adjustment to percent of ceded written premiums | 0.50% | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Commission rate, reduced adjustment to percent of ceded written premiums | 30.50% | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Contract extension | 1 year | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Contract extension | 3 years | 1 year | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Cancellation notice period | 9 months | 30 days | 30 days | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Cancellation notice period upon the occurrence of certain early termination events | 30 days | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Early termination events, reduction threshold of stockholders' equity | 50.00% | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Commission rate, adjustment criteria, loss ratio floor | 81.50% | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Commission rate, adjustment criteria, loss ratio ceiling | 95.00% | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Premiums and losses related to policies | 40.00% | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Maximum limit of liability attaching | 2,000,000 | 10,000,000 | 5,000,000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Percent basis currency equivalent of maximum limit of liability attaching | 100.00% | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Portion of excess performance to be shared | 50.00% | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Agreement period | 3 years | 1 year | 1 year | 10 months | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Revenue from related parties | 35,000 | 507,000 | 56,000 | 38,000 | 1,116,000 | 759,000 | 303,000 | 44,000 | ||||||||||||||||||||||||||||||||||||||||||||||||||
| Percent of gross liabilities, from related party | 100.00% | 80.00% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Percent of gross liabilities, from third party | 20.00% | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Expenses recorded from related party transactions | 86,674,000 | 62,379,000 | 2,000 | 25,000 | 47,000 | 22,000 | 3,811,000 | 2,754,000 | 1,000 | 1,000 | 1,224,000 | 1,041,000 | 0 | 0 | ||||||||||||||||||||||||||||||||||||||||||||
| Reinsurance coverage threshold | 1,000,000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Percent of credit insurance business to cede | 90.00% | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Percent of general liability business to cede | 100.00% | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Loan to related party | 167,975,000 | 167,975,000 | 167,975,000 | 167,975,000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Loan to related party, Basis spread on LIBOR | 0.90% | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Loan to related party, LIBOR basis spread assessment period | 360 days | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Collateral held by related party | 1,135,312,000 | 1,094,964,000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Accrued interest on collateral held by related party | 8,221,000 | 8,159,000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Brokerage fee, percent of premium assumed | 1.25% | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Reserve for loss and loss adjustment expenses | 10,019,000 | 8,592,000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Quarterly brokerage fee, below portfolio threshold, percent of average holdings | 0.05% | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Quarterly brokerage fee, portfolio threshold | $ 1,000,000,000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Quarterly brokerage fee, above portfolio threshold, percent of average holdings | 0.0375% | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||