Losses And Loss Adjustment Expenses (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Extraordinary Item [Line Items]
Decrease in provision for insured events	$ 3,000,000
Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims, Prior Years	3,193,000	2,960,000	42,332,000
Increase in provision for insured events			42,000,000
Catastrophe [Member]
Extraordinary Item [Line Items]
Pre-tax catastrophe losses	$ 11,000,000	$ 17,000,000	$ 39,000,000