Reinsurance (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Reinsurance Disclosures [Abstract]
Limit for reinsuring risk	$ 500,000			$ 250,000
Total life insurance in force	23,100,000,000	22,400,000,000
Ceded premiums	5,300,000,000	5,400,000,000
Reinsurance receivable	7,400,000	8,200,000
Reinsurance premiums	19,049,000	18,741,000	19,784,000
Reinsurance recoveries	$ 6,400,000	$ 7,000,000	$ 8,200,000