Dividends From Subsidiaries And Statutory Financial Information (Schedule of Combined Net Income and Policyholders' Surplus in Accordance with Statutory Accounting Practices) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Insurance [Abstract]
Amount available for dividend distribution without prior approval from regulatory authorities	$ 491,000,000
Net income	680,418,000	490,119,000	417,441,000
Policyholders' surplus	4,908,010,000	4,671,922,000	4,107,745,000
Increase in BIC's statutory capital and surplus	282,000,000
Total Adjusted Capital percentage threshold	200.00%
BIC's Total Adjusted Capital balance	$ 4,600,000,000
BIC's Total Adjusted Capital balance as percentage of RBC Authorized Control Level	5.00%