Investments (Balance of and Changes in AOCI Components) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Accumulated other comprehensive income $ 56,646,000 $ 267,461,000    
AccumulatedTranslationAdjustmentMember
        
Accumulated other comprehensive income 403,000 257,000 133,000 249,000
Change in Other Comprehensive Income 224,000 124,000 [1] (116,000) [1]  
Amount Reclassified from AOCI 0      
Income Tax Benefit Expense (78,000)      
Accumulated Net Unrealized Investment Gain (Loss) [Member]
        
Accumulated other comprehensive income 56,243,000 [2] 267,204,000 [2] 213,495,000 [2] 182,850,000 [2]
Change in Other Comprehensive Income (290,636,000) [2] 53,709,000 [1],[2] 30,645,000 [1],[2]  
Amount Reclassified from AOCI (33,920,000) [2],[3],[4] (22,644,000) [3],[4] (75,822,000) [3],[5]  
Income Tax Benefit Expense 113,595,000 [2]      
Cash Flow Hedge Gain Loss To AOCI 5,000,000 [2] 0 [2] 3,000,000 [2]  
Accumulated Other Comprehensive Income (loss) [Member]
        
Accumulated other comprehensive income 56,646,000 267,461,000 213,628,000 183,099,000
Change in Other Comprehensive Income (290,412,000) 53,833,000 [1] 30,529,000 [1]  
Amount Reclassified from AOCI (33,920,000) [3],[4] (22,644,000) [3],[4] (75,822,000) [3],[5]  
Income Tax Benefit Expense $ 113,517,000      
[1] Net of taxes.
[2] Includes cash flow hedges of ($5) million, $0 million and $3 million as of December 31, 2013, 2012 and 2011, respectively.
[3] _____________ All amounts are shown before tax.
[4] Positive amounts indicate gains/benefits reclassified out of AOCI. Negative amounts indicate losses/costs reclassified out of AOCI.
[5] See Note 11 for additional information on cash flow hedges.