Fair Value (Schedule Of Realized Gains (Losses) Using Level 3 Inputs) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Document Fiscal Year Focus			2013
Dividends And Other Investment Income [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Realized gains (losses) from Level 3 inputs	$ (60)	$ 3,859	$ (45)	$ 4,516
Fixed Income Securities Gains (Losses), Net [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Realized gains (losses) from Level 3 inputs	(1,161)	5,470	2,116	6,137
Level 3 Equity Securities Gains (Losses), Net [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Realized gains (losses) from Level 3 inputs	0	10,417	0	10,359
US States and Political Subdivisions Debt Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value Assets Measured On Recurring Basis And Gain Loss Included In Fixed Income Securities Gains (Losses), Net	15		36
Fair Value, Assets Measured On Recurring Basis, And Gain (Loss) Included In Accretion Of Purchase Discount On Securities Available-For-Sale		21	21	64
Trust Preferred Securities Real Estate Investment Trusts [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value, Assets Measured On Recurring Basis, And Gain (Loss) Included In Accretion Of Purchase Discount On Securities Available-For-Sale	$ 63	$ 61	$ 126	$ 101