Reinsurance (Percentage Payout Of Incurred Claims) (Details)	12 Months Ended
	Dec. 31, 2016
Percentage of Claims Paid During Period One [Member]
Percentage Payment by Period [Line Items]
Payout of Incurred Claims	95.60%
Percentage of Claims Paid During Period Two [Member]
Percentage Payment by Period [Line Items]
Payout of Incurred Claims	4.30%
Percentage of Claims Paid During Period Three [Member]
Percentage Payment by Period [Line Items]
Payout of Incurred Claims	0.10%