2.4.0.82010 - Disclosure - Basis of Presentation and Summary of Significant Accounting Policies (Policies)truefalsefalse1false falsefalseD2013Q2YTDhttp://www.sec.gov/CIK0001165880duration2013-01-01T00:00:002013-06-30T00:00:001true 1us-gaap_AccountingPoliciesAbstractus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Basis of Presentation and Summary of Significant Accounting Policies2false 2us-gaap_InsurancePremiumsRevenueRecognitionPolicyus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00<div style="font-size:10.0pt;font-family:Times New Roman;"> <div style="BORDER-BOTTOM: white 1pt solid; BORDER-LEFT: white 1pt solid; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: white 1pt solid; BORDER-RIGHT: white 1pt solid; PADDING-TOP: 0in;"> <p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;">Insurance and Reinsurance Premiums and Related Costs <p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;">  <p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;">Reinsurance contracts can be written on a risks-attaching or losses-occurring basis. Under risks-attaching reinsurance contracts, all claims from cedants’ underlying policies incepting during the contract period are covered, even if they occur after the expiration date of the reinsurance contract. In contrast, losses-occurring reinsurance contracts cover all claims occurring during the period of the contract, regardless of the inception dates of the underlying policies. Any claims occurring after the expiration of the losses-occurring contract are not covered. <p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;">  <p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;">Premiums written are recognized as revenues, net of any applicable underlying reinsurance coverage, and are earned over the term of the related policy or contract.  For direct insurance, and facultative and losses-occurring contracts, the earnings period is the same as the reinsurance contract. For risks-attaching contracts, the earnings period is based on the terms of the underlying insurance policies. <p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;">  <p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;">For contracts that have a risk period of three years or less, the premiums are earned ratably over the term. For the few contracts with risk periods greater than three years, premiums are earned in accordance with predetermined schedules that reflect the level of risk associated with each period in the contract term. These schedules are reviewed periodically and are adjusted as deemed necessary. <p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;">  <p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;">For the majority of Montpelier’s excess-of-loss contracts, written premium is based on the deposit or minimum premium as defined in the contract. Subsequent adjustments, based on reports of actual premium or revisions in estimates by ceding companies, are recorded in the period in which they are determined.  For pro-rata contracts and excess-of-loss contracts where no deposit or minimum premium is specified in the contract, written premium is recognized based on estimates of ultimate premiums provided by ceding companies and Montpelier’s underwriters. Initial estimates of written premium are recognized in the period in which the underlying risks incept. Subsequent adjustments, based on reports of actual premium by the ceding companies, or revisions in estimates, are recorded in the period in which they are determined. Such adjustments are generally determined after the associated risk periods have expired, in which case the premium adjustments are fully earned when written.  Unearned premiums represent the portion of premiums written that are applicable to future insurance or reinsurance coverage provided by policies or contracts in force.</div>   <div style="BORDER-BOTTOM: white 1pt solid; BORDER-LEFT: white 1pt solid; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: white 1pt solid; BORDER-RIGHT: white 1pt solid; PADDING-TOP: 0in;"> <p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;">Premiums receivable are recorded at amounts due less any provision for doubtful accounts.  As of June 30, 2013 and December 31, 2012, Montpelier’s provision for doubtful accounts was $3.9 million and $3.8 million, respectively. <p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;">  <p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;">When a reinsurance contract provides for a reinstatement of coverage following a covered loss, the associated reinstatement premium is recorded as both written and earned when Montpelier determines that such a loss event has occurred.</div>   <div style="BORDER-BOTTOM: white 1pt solid; BORDER-LEFT: white 1pt solid; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: white 1pt solid; BORDER-RIGHT: white 1pt solid; PADDING-TOP: 0in;"> <p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;">Deferred acquisition costs are comprised of commissions, brokerage costs, premium taxes and excise taxes, each of which relates directly to the writing of insurance and reinsurance contracts. These deferred acquisition costs are generally amortized over the underlying risk period of the related contracts.  However, if the sum of a contract’s expected losses and LAE, and deferred acquisition costs exceeds related unearned premiums and projected investment income, a premium deficiency is determined to exist. In this event, deferred acquisition costs are immediately expensed to the extent necessary to eliminate the premium deficiency.  If the premium deficiency exceeds deferred acquisition costs then a liability is accrued for the excess deficiency. There were no significant premium deficiency adjustments recognized during the periods presented. <p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;">  <p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;">Also included in acquisition costs are profit commissions earned and incurred. Accrued profit commissions payable are included in insurance and reinsurance balances payable and accrued profit commissions receivable are included in other assets on the Company’s consolidated balance sheets. <p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;"> </div> </div>falsefalsefalsenonnum:textBlockItemTypenaDisclosure of accounting policy for premium revenue recognition, including the basis for measurement and the timing of recognition of revenue from insurance premiums received from contract holders.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367646&loc=d3e18780-107790 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 605 -URI http://asc.fasb.org/subtopic&trid=4738349 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 605 -Section 25 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6486413&loc=d3e25896-158540 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 605 -Section 25 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6486390&loc=d3e25718-158539 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 22 -Paragraph 12, 13 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 97 -Paragraph 15-22 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 60 -Paragraph 13, 14, 15, 16 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-LHI -Paragraph 12, 13, 18, 20 -IssueDate 2006-05-01 -Chapter 7 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-PLI -Paragraph 31, 32, 33 -IssueDate 2006-09-01 -Chapter 3 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. false0Insurance and Reinsurance Premiums and Related Costs3false 2us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlockus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00<div style="font-size:10.0pt;font-family:Times New Roman;"> <div style="BORDER-BOTTOM: white 1pt solid; BORDER-LEFT: white 1pt solid; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: white 1pt solid; BORDER-RIGHT: white 1pt solid; PADDING-TOP: 0in;"> <p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;">Foreign Currency Exchange <p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;">  <p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;">The U.S. dollar is the Company’s reporting currency.  The British pound is the functional currency for the Company’s U.K.- based operations and the Swiss franc is the functional currency for the operations of MEAG. The U.S. dollar is the functional currency for all other operations. The assets and liabilities of the Company’s U.K. and Swiss operations are converted to U.S. dollars at exchange rates in effect at the balance sheet date, and the related revenues and expenses are converted using average exchange rates for the period. Net foreign exchange gains and losses arising from translating these foreign operations to U.S. dollars are reported as a separate component of shareholders’ equity as translation gains and losses, with changes therein reported as a component of other comprehensive income. <p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;">  <p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;">The following rates of exchange to the U.S. dollar were used to translate the results of the Company’s U.K. and Swiss operations: <p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;"> </div> <table style="text-align:left;WIDTH: 100%; BORDER-COLLAPSE: collapse;" border="0" cellspacing="0" cellpadding="0" width="100%"> <tr style="padding:0;"> <td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 41%; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="41%"> Currency </td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 12%; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="12%"> Opening Rate January 1, 2013</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 12%; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="12%"> Closing Rate June 30, 2013</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 12%; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="12%"> Opening Rate January 1, 2012</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 12%; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="12%"> Closing Rate June 30, 2012</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 1%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="1%">  </td></tr> <tr style="padding:0;"> <td style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 41%; PADDING-RIGHT: 0in; BACKGROUND: #cceeff; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" bgcolor="#CCEEFF" valign="bottom" width="41%"> British Pound (GBP)</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; BACKGROUND: #cceeff; PADDING-TOP: 0in;" bgcolor="#CCEEFF" valign="bottom" width="2%">  </td> <td style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 12%; PADDING-RIGHT: 0in; BACKGROUND: #cceeff; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" bgcolor="#CCEEFF" valign="bottom" width="12%"> 1.6234</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; BACKGROUND: #cceeff; PADDING-TOP: 0in;" bgcolor="#CCEEFF" valign="bottom" width="2%">  </td> <td style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 12%; PADDING-RIGHT: 0in; BACKGROUND: #cceeff; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" bgcolor="#CCEEFF" valign="bottom" width="12%"> 1.5212</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; BACKGROUND: #cceeff; PADDING-TOP: 0in;" bgcolor="#CCEEFF" valign="bottom" width="2%">  </td> <td style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 12%; PADDING-RIGHT: 0in; BACKGROUND: #cceeff; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" bgcolor="#CCEEFF" valign="bottom" width="12%"> 1.5617</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; BACKGROUND: #cceeff; PADDING-TOP: 0in;" bgcolor="#CCEEFF" valign="bottom" width="2%">  </td> <td style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 12%; PADDING-RIGHT: 0in; BACKGROUND: #cceeff; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" bgcolor="#CCEEFF" valign="bottom" width="12%"> 1.5570</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 1%; PADDING-RIGHT: 0in; BACKGROUND: #cceeff; PADDING-TOP: 0in;" bgcolor="#CCEEFF" valign="bottom" width="1%">  </td></tr> <tr style="padding:0;"> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 41%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="41%"> Swiss Franc (CHF)</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 12%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="12%"> 1.0924</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 12%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="12%"> 1.0583</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 12%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="12%"> 1.0634</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.5%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%">  </td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 12%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="12%"> 1.0546</td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 1%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="1%">  </td></tr></table> <div style="BORDER-BOTTOM: white 1pt solid; BORDER-LEFT: white 1pt solid; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: white 1pt solid; BORDER-RIGHT: white 1pt solid; PADDING-TOP: 0in;"> <p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;">  <p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;">Other transactions involving certain monetary assets and liabilities denominated in foreign currencies have been converted into the appropriate functional currencies at exchange rates in effect at the balance sheet date, and the related revenues and expenses are converted using either specific or average exchange rates for the period, as appropriate.  Net foreign currency transaction gains and losses arising from these activities are reported as a component of net income in the period in which they arise. <p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;"> </div> </div>falsefalsefalsenonnum:textBlockItemTypenaDisclosure of accounting policy for (1) transactions denominated in a currency other than the reporting enterprise's functional currency, (2) translating foreign currency financial statements that are incorporated into the financial statements of the reporting enterprise by consolidation, combination, or the equity method of accounting, and (3) remeasurement of the financial statements of a foreign reporting enterprise in a hyperinflationary economy.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367646&loc=d3e18780-107790 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 20 -URI http://asc.fasb.org/subtopic&trid=2175856 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 10 -URI http://asc.fasb.org/subtopic&trid=2175826 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -URI http://asc.fasb.org/subtopic&trid=2175892 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 52 -Paragraph 5, 7-20, 80 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. false0Foreign Currency Exchange4false 2us-gaap_InvestmentPolicyTextBlockus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00<div style="font-size:10.0pt;font-family:Times New Roman;"> <div style="BORDER-BOTTOM: white 1pt solid; BORDER-LEFT: white 1pt solid; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: white 1pt solid; BORDER-RIGHT: white 1pt solid; PADDING-TOP: 0in;"> <p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;">Investments <p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;">  <p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;">Montpelier’s fixed maturity investments, equity securities and investment securities sold short are carried at fair value, with the net unrealized appreciation or depreciation on such securities included in income and reported within net realized and unrealized investment gains (losses) on the Company’s consolidated statement of operations.</div>   <div style="BORDER-BOTTOM: white 1pt solid; BORDER-LEFT: white 1pt solid; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: white 1pt solid; BORDER-RIGHT: white 1pt solid; PADDING-TOP: 0in;"> <p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;">Montpelier’s other investments are carried at either fair value or based on the equity method of accounting (which is based on underlying net asset values) and consist primarily of investments in limited partnership interests and private investment funds, the BCGR Listed Fund, private placements and certain derivative instruments.  See Notes 4 and 6. <p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;">  <p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;">Investments, including investment securities sold short, are recorded on a trade date basis. For those marketable securities not listed and regularly traded on an established exchange, fair values are determined based on bid prices, as opposed to ask prices.  Fair values are not adjusted for transaction costs. Gains and losses on sales of investments are determined on the first-in, first-out basis and are included in income when realized. Realized investment gains and losses typically result from the actual sale of securities. Unrealized investment gains and losses represent the gain or loss that would result from a hypothetical sale of securities on the reporting date. In instances where the Company becomes aware of a significant unrealized loss with little or no likelihood of recovery, it writes down the cost basis of the investment and recognizes the loss as being realized. <p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;">  <p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;">Some of Montpelier’s investment managers are entitled to performance fees determined as a percentage of their portfolio’s net total return achieved over specified periods. Montpelier’s net realized and unrealized investment gains and net income (loss) from derivative instruments are presented net of any associated performance fees.  Montpelier incurred (reversed) performance fees related to its investments and investment-related derivative instruments of $(0.6) million and $0.6 million during the three month periods ended June 30, 2013 and 2012, respectively, and $0.6 million and $2.8 million during the six month periods ended June 30, 2013 and 2012, respectively. <p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;"> </div> </div>falsefalsefalsenonnum:textBlockItemTypenaDisclosure of accounting policy for investments in financial assets, including marketable securities (debt and equity securities with readily determinable fair values), investments accounted for under the equity method and cost method, securities borrowed and loaned, and repurchase and resale agreements. For marketable securities, the disclosure may include the entity's accounting treatment for transfers between investment categories and how the fair values for such securities are determined. Also, for all investments, an entity may describe its policy for assessing, recognizing and measuring impairment of the investment.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 7-16 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 10, 11 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367646&loc=d3e18780-107790 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 325 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6872867&loc=d3e40691-111596 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13433-108611 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27290-111563 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section M Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.2,12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS115-1/124-1 -Paragraph 7-18 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 11: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 2, 12 -Article 5 false0Investments5false 2us-gaap_CashAndCashEquivalentsPolicyTextBlockus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00<div style="font-size:10.0pt;font-family:Times New Roman;FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt;"> <div style="BORDER-BOTTOM: white 1pt solid; BORDER-LEFT: white 1pt solid; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: white 1pt solid; BORDER-RIGHT: white 1pt solid; PADDING-TOP: 0in;"> <p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;">Cash <p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;"> </div> <div style="BORDER-BOTTOM: white 1pt solid; BORDER-LEFT: white 1pt solid; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: white 1pt solid; BORDER-RIGHT: white 1pt solid; PADDING-TOP: 0in;"> <p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;">Cash and cash equivalents include cash and fixed income investments with maturities of less than three months, as measured from the date of purchase.  Restricted cash of $115.6 million at June 30, 2013 consisted of $103.3 million of collateral supporting investment securities sold short and derivative positions and $12.3 million of foreign deposit accounts held at Lloyd’s.  Restricted cash of $70.6 million at December 31, 2012 consisted of $57.1 million of collateral supporting investment securities sold short and derivative positions and $13.5 million of foreign deposit accounts held at Lloyd’s. <p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;">  <p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;">As of June 30, 2013 and December 31, 2012, $2.4 million and $47.4 million, respectively, of Montpelier’s cash equivalents represented repurchase agreements which were fully collateralized. <p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;">  <p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;">Net investment income is stated net of investment management, custody and other investment-related expenses. Investment income is recognized when earned and includes interest and dividend income together with the amortization of premiums and the accretion of discounts associated with those fixed maturity investments that were purchased at amounts different from their par value. <p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;"> </div></div>falsefalsefalsenonnum:textBlockItemTypenaDisclosure of accounting policy for cash and cash equivalents, including the policy for determining which items are treated as cash equivalents. Other information that may be disclosed includes (1) the nature of any restrictions on the entity's use of its cash and cash equivalents, (2) whether the entity's cash and cash equivalents are insured or expose the entity to credit risk, (3) the classification of any negative balance accounts (overdrafts), and (4) the carrying basis of cash equivalents (for example, at cost) and whether the carrying amount of cash equivalents approximates fair value.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367646&loc=d3e18780-107790 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash -URI http://asc.fasb.org/extlink&oid=6506951 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4273-108586 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 1 -Article 5 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 305 -SubTopic 10 -URI http://asc.fasb.org/subtopic&trid=2122427 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Financial Reporting Release (FRR) -Number 203 -Paragraph 02-03 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Technical Practice Aid (TPA) -Number 2110 -Paragraph 6 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 7, 8, 9, 10 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. false0Cash6false 2mrh_SharesHeldInTreasuryPolicyTextBlockmrh_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00<div style="font-size:10.0pt;font-family:Times New Roman;"> <p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;">Common Shares Held in Treasury <p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;">  <p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;">Common Shares held in treasury are carried at cost and any resulting gain or loss on subsequent issuances is determined on a last-in, first-out basis.  As of June 30, 2013 and December 31, 2012, the Company had inception-to-date gains from issuances of its treasury shares of $0.1 million and $0.6 million, respectively, which have been recorded as additional paid-in capital on the Company’s consolidated balance sheets. See Note 7. <p style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; TEXT-INDENT: 0.15in; MARGIN: 0in 0in 0pt; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;">  </div>falsefalsefalsenonnum:textBlockItemTypenaDisclosure of the policy for common shares held in treasury.No definition available.false0Common Shares Held in TreasuryfalseBasis of Presentation and Summary of Significant Accounting Policies (Policies)UnKnownUnKnownUnKnownUnKnowntruefalsefalseSheethttp://www.montpelierre.bm/role/DisclosureBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesPolicies16