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Fair Value of Assets and Liabilities Fair Value of Assets and Liabilities (Fair Value Assets Measured on Non-Recurring Basis) (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Jun. 30, 2013
Dec. 31, 2012
Jun. 30, 2012
Dec. 31, 2011
Mortgage Loans [Member]
                
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]                
Fair Value Assets Carrying Value Prior To Impairment $ 13,528 [1] $ 25,092 [1] $ 13,436 [1] $ 27,836 [1]        
Fair Value Assets Estimate Of Fair Value 13,575 [1] 23,467 [1] 13,575 [1] 23,467 [1]        
Fair Value Assets Gains Losses 47 [1] (1,625) [1] 139 [1] (4,369) [1]        
Limited Partnership Interest [Member]
                
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]                
Fair Value Assets Carrying Value Prior To Impairment     11,590 [2] 25,191 [2]        
Fair Value Assets Estimate Of Fair Value     9,161 [2] 16,944 [2]        
Fair Value Assets Gains Losses     (2,429) [2] (8,247) [2]        
Real Estate Investment [Member]
                
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]                
Fair Value Assets Carrying Value Prior To Impairment 0 [3] 23,012 [3] 4,736 [3] 0 [3]        
Fair Value Assets Estimate Of Fair Value 0 [3] 15,558 [3] 4,136 [3] 0 [3]        
Fair Value Assets Gains Losses 0 [3] (7,454) [3] (600) [3] 0 [3]        
Nonredeemable Preferred Stock [Member]
                
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value         0 0    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) 186   186          
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases 0 [4]   0 [4]          
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales 0 [4]   0 [4]          
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements 0 [4]   0 [4]          
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 4,639   4,639          
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 0   0          
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value 4,825   4,825          
Short-term Investments [Member]
                
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value           22,031   0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)     (28) 54        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases     0 [4] 22,014 [4]        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales     0 [4] 0 [4]        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements     (22,000) [4] 0 [4]        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3     0 0        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3     0 0        
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value 0 22,061 0 22,061        
Other Debt Obligations [Member]
                
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value             3,227 11,489
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)   0   843        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases   0 [4]   108 [4]        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales   0 [4]   (3,788) [4]        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements   0 [4]   0 [4]        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3   0   0        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3   (3,227)   (9,750)        
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value   0   0        
Funds Withheld At Interest Embedded Derivatives [Member]
                
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value         (108,473) (243,177) (375,337) (361,456)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) 0 0 0 0        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases 0 [4] 0 [4] 0 [4] 0 [4]        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales 0 [4] 0 [4] 0 [4] 0 [4]        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements 0 [4] 0 [4] 0 [4] 0 [4]        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 0 0 0 0        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 0 0 0 0        
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value (175,933) (320,501) (175,933) (320,501)        
Short-term Debt [Member]
                
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value             0  
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)   54            
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases   22,014 [4]            
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales   0 [4]            
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements   0 [4]            
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3   0            
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3   0            
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value   22,061   22,061        
Investment Related Gains Losses [Member] | Nonredeemable Preferred Stock [Member]
                
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings 0   0          
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) 0   0          
Investment Related Gains Losses [Member] | Short-term Investments [Member]
                
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings     0 0        
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)     0 0        
Investment Related Gains Losses [Member] | Other Debt Obligations [Member]
                
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings   0   1,098        
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)   0   (183)        
Investment Related Gains Losses [Member] | Funds Withheld At Interest Embedded Derivatives [Member]
                
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings (67,460) 54,836 67,244 40,955        
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) (67,460) 54,836 67,244 40,955        
Investment Related Gains Losses [Member] | Short-term Debt [Member]
                
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings   0            
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)   0            
Insurance Claims [Member] | Nonredeemable Preferred Stock [Member]
                
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings 0   0          
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) 0   0          
Insurance Claims [Member] | Short-term Investments [Member]
                
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings     0 0        
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)     0 0        
Insurance Claims [Member] | Other Debt Obligations [Member]
                
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings   0   0        
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)   0   0        
Insurance Claims [Member] | Funds Withheld At Interest Embedded Derivatives [Member]
                
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings 0 0 0 0        
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) 0 0 0 0        
Insurance Claims [Member] | Short-term Debt [Member]
                
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings   0            
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)   0            
Interest Income [Member] | Nonredeemable Preferred Stock [Member]
                
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings 0   0          
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) 0   0          
Interest Income [Member] | Short-term Investments [Member]
                
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings     0 0        
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)     0 0        
Interest Income [Member] | Other Debt Obligations [Member]
                
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings   0   0        
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)   0   0        
Interest Income [Member] | Funds Withheld At Interest Embedded Derivatives [Member]
                
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings 0 0 0 0        
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) 0 0 0 0        
Interest Income [Member] | Short-term Debt [Member]
                
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings   0            
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)   0            
Policy Acquisition Costs And Other Insurance Expenses [Member] | Nonredeemable Preferred Stock [Member]
                
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings 0   0          
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) 0   0          
Policy Acquisition Costs And Other Insurance Expenses [Member] | Short-term Investments [Member]
                
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings     0 0        
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)     0 0        
Policy Acquisition Costs And Other Insurance Expenses [Member] | Other Debt Obligations [Member]
                
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings   0   0        
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)   0   0        
Policy Acquisition Costs And Other Insurance Expenses [Member] | Funds Withheld At Interest Embedded Derivatives [Member]
                
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings 0 0 0 0        
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) 0 0 0 0        
Policy Acquisition Costs And Other Insurance Expenses [Member] | Short-term Debt [Member]
                
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings   0            
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)   0            
Investment Income [Member] | Nonredeemable Preferred Stock [Member]
                
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings 0   0          
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) 0   0          
Investment Income [Member] | Short-term Investments [Member]
                
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings     (3) (7)        
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)     (4) (7)        
Investment Income [Member] | Other Debt Obligations [Member]
                
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings   0   0        
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)   0   0        
Investment Income [Member] | Funds Withheld At Interest Embedded Derivatives [Member]
                
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings 0 0 0 0        
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) 0 0 0 0        
Investment Income [Member] | Short-term Debt [Member]
                
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings   (7)            
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)   (7)            
Available-for-sale Securities [Member] | Commercial Mortgage Backed Securities [Member]
                
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value         180,982 167,006 115,733 115,976
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) 8,998 6,188 36,943 17,436        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases 19,420 [4] 21,092 [4] 19,420 [4] 21,092 [4]        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales (81,253) [4] 0 [4] (83,974) [4] (1,552) [4]        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements (233) [4] (511) [4] (2,701) [4] (568) [4]        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 3,425 26,208 3,425 37,054        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 0 0 0 (10,178)        
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value 124,941 167,068 124,941 167,068        
Available-for-sale Securities [Member] | US Treasury And Government Member
                
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value         0 4,538 0 0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) (40) (15) (40) (15)        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases 0 [4] 4,640 [4] 0 [4] 4,640 [4]        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales 0 [4] 0 [4] 0 [4] 0 [4]        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements 0 [4] 0 [4] 0 [4] 0 [4]        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 3,462 0 3,462 0        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 0 0 (4,538) 0        
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value 3,422 4,566 3,422 4,566        
Available-for-sale Securities [Member] | Investment Related Gains Losses [Member] | Commercial Mortgage Backed Securities [Member]
                
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings (6,864) (2,088) (16,726) (13,771)        
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) (134) (2,088) (10,243) (14,163)        
Available-for-sale Securities [Member] | Investment Related Gains Losses [Member] | US Treasury And Government Member
                
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings 0 0 0 0        
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) 0 0 0 0        
Available-for-sale Securities [Member] | Insurance Claims [Member] | Commercial Mortgage Backed Securities [Member]
                
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings 0 0 0 0        
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) 0 0 0 0        
Available-for-sale Securities [Member] | Insurance Claims [Member] | US Treasury And Government Member
                
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings 0 0 0 0        
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) 0 0 0 0        
Available-for-sale Securities [Member] | Interest Income [Member] | Commercial Mortgage Backed Securities [Member]
                
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings 0 0 0 0        
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) 0 0 0 0        
Available-for-sale Securities [Member] | Interest Income [Member] | US Treasury And Government Member
                
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings 0 0 0 0        
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) 0 0 0 0        
Available-for-sale Securities [Member] | Policy Acquisition Costs And Other Insurance Expenses [Member] | Commercial Mortgage Backed Securities [Member]
                
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings 0 0 0 0        
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) 0 0 0 0        
Available-for-sale Securities [Member] | Policy Acquisition Costs And Other Insurance Expenses [Member] | US Treasury And Government Member
                
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings 0 0 0 0        
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) 0 0 0 0        
Available-for-sale Securities [Member] | Investment Income [Member] | Commercial Mortgage Backed Securities [Member]
                
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings 466 446 1,548 1,579        
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) 301 446 1,382 1,579        
Available-for-sale Securities [Member] | Investment Income [Member] | US Treasury And Government Member
                
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings 0 (59) 0 (59)        
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) $ 0 $ (59) $ 0 $ (59)        
[1] Mortgage loans — The impaired mortgage loans presented above were written down to their estimated fair values at the date the impairments were recognized and are reported as losses above. Subsequent improvements in estimated fair value on previously impaired loans recorded through a reduction in the previously established valuation allowance are reported as gains above. Nonrecurring fair value adjustments on mortgage loans are based on the fair value of underlying collateral or discounted cash flows.
[2] Limited partnership interests — The impaired investments presented above were accounted for using the cost method. Impairments on these cost method investments were recognized at estimated fair value determined using the net asset values of the Company’s ownership interest as provided in the financial statements of the investees. The market for these investments has limited activity and price transparency.
[3] Real estate investment - The impaired real estate investments presented above were written down to their estimated fair value at the date of impairment and are reported as losses above. The impairments were based on third-party appraisal values obtained and reviewed by the Company.
[4] The amount reported within purchases, sales and settlements is the purchase price (for purchases) and the sales/settlement proceeds (for sales and settlements) based upon the actual date purchased or sold/settled. Items purchased and sold/settled in the same period are excluded from the rollforward. The Company had no issuances during the period.