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Retirement And Other Employee Benefits (Narrative) (Details)
12 Months Ended
Dec. 31, 2015
USD ($)
security
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Jan. 01, 2015
Defined Benefit Plan Disclosure [Line Items]        
Percentage of Assurant Pension Plan deficit added to amount of service cost 15.00%      
Pension Contributions $ 10,750,000      
Funded status percentage       136.00%
Length of averaging method 5 years      
Number of bonds in yield curve that is utilized in the cash flow analysis for the pension plan | security 281      
Percentage of actual return on plan assets (0.60%) 13.00%    
Amounts expensed by contribution plan $ 44,455,000 $ 44,796,000 $ 39,263,000  
Pension Benefits        
Defined Benefit Plan Disclosure [Line Items]        
Net loss amortized from AOCI into net periodic benefit cost over the next fiscal year 8,699,000      
Prior service cost amortized from AOCI into net periodic benefit cost over the next fiscal year 435,000      
Retirement Health Benefits        
Defined Benefit Plan Disclosure [Line Items]        
Future Pension Contributions 0      
Prior service cost amortized from AOCI into net periodic benefit cost over the next fiscal year $ 933,000      
Alternative investment fund:        
Defined Benefit Plan Disclosure [Line Items]        
Percentage of plan assets invested 20.00%      
MIMSF        
Defined Benefit Plan Disclosure [Line Items]        
Actual plan asset allocations 7.00%      
Equity securities        
Defined Benefit Plan Disclosure [Line Items]        
Percentage of plan assets invested 30.00%      
Weighted average plan asset allocation 33.00%      
Mutual funds- U.S. listed large cap        
Defined Benefit Plan Disclosure [Line Items]        
Percentage of plan assets invested [1],[2] 15.00%      
Weighted average plan asset allocation 52.00%      
Fixed maturity securities        
Defined Benefit Plan Disclosure [Line Items]        
Percentage of plan assets invested 50.00%      
Weighted average plan asset allocation 49.00%      
Fixed Maturity Communications        
Defined Benefit Plan Disclosure [Line Items]        
Industry concentration risk percentage 12.00%      
Maximum exposure to creditor 6.00%      
Fixed Maturity Financial        
Defined Benefit Plan Disclosure [Line Items]        
Industry concentration risk percentage 15.00%      
Maximum exposure to creditor 4.00%      
Fixed Maturity Consumer Non Cyclical Industry        
Defined Benefit Plan Disclosure [Line Items]        
Industry concentration risk percentage 9.00%      
Maximum exposure to creditor 7.00%      
Minimum        
Defined Benefit Plan Disclosure [Line Items]        
Number of years to maturity for bonds in yield curve that is utilized in the cash flow analysis for the pension plan 0 years      
Maximum        
Defined Benefit Plan Disclosure [Line Items]        
Future Pension Contributions $ 0      
Number of years to maturity for bonds in yield curve that is utilized in the cash flow analysis for the pension plan 30 years      
Maximum | Pension Benefits        
Defined Benefit Plan Disclosure [Line Items]        
Future Pension Contributions $ 0      
[1] It is understood that these guidelines are targets and that deviations may occur periodically as a result of cash flows, market impact or short-term decisions implemented by either the Investment Committee or their investment managers.
[2] The Plans’ long-term asset allocation targets are 30% equity, 50% fixed income and 20% investment funds. The Company invests certain plan assets in investment funds, examples of which include real estate investment funds and private equity funds. Amounts allocated for these investments are included in the alternative investment funds caption of the asset allocation at December 31, 2015, provided in the section above.