Fair Value Of Financial Instruments (Schedule Of Changes In Fair Value Carrying Values Associated With Level 3 Financial Instruments) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Corporate Fixed Income Securities [Member]
Unrealized gains/(losses), Included in changes in net assets	$ 779	$ 42
Realized gains/(losses), Assets	281	282
Purchases, Assets	10,261	27,337
Sales, Assets	(6,888)	(25,663)
Redemptions, Assets	(1,349)	(443)
Transfers, Into Level 3, Assets	139	2,687
Transfers, Out of Level 3, Assets	(1,767)	(7,401)
Net change, Assets	1,456	(3,159)
Equity Securities [Member]
Unrealized gains/(losses), Included in changes in net assets	1,333
Purchases, Assets	11,717
Sales, Assets	(208)
Transfers, Out of Level 3, Assets	(12,601)
Net change, Assets	241
Ending Balance, Assets	241
State And Municipal Securities [Member]
Unrealized gains/(losses), Included in OCI, Assets	(1,822)	(1,779)
Realized gains/(losses), Assets	2,053	230
Purchases, Assets	5,000	47,840
Redemptions, Assets	(32,000)	(22,700)
Transfers, Into Level 3, Assets	6,201
Transfers, Out of Level 3, Assets	(63,719)
Net change, Assets	(84,287)	23,591
Available-For-Sale Securities [Member]
Unrealized gains/(losses), Included in changes in net assets	(233)
Transfers, Into Level 3, Assets	58,311
Net change, Assets	58,078
Ending Balance, Assets	58,078
Equity Auction Rate Securities [Member]
Unrealized gains/(losses), Included in changes in net assets	571	21
Purchases, Assets	75	3,400
Redemptions, Assets	(8,350)	(42,200)
Net change, Assets	(7,704)	(38,779)
Municipal Auction Rate Securities [Member]
Unrealized gains/(losses), Included in changes in net assets	75	(207)
Purchases, Assets		6,750
Redemptions, Assets	(3,203)	(4,205)
Net change, Assets	(3,128)	2,338
Other Investment [Member]
Unrealized gains/(losses), Included in changes in net assets	6,328	2,290
Realized gains/(losses), Assets	13	2,267
Purchases, Assets	50,914	1,672
Sales, Assets	(6,801)	(5,965)
Redemptions, Assets	(2,584)
Transfers, Into Level 3, Assets	12,601
Net change, Assets	60,471	264
Corporate Fixed Income Securities 2 [Member]
Redemptions, Assets		(12,000)
Net change, Assets		(12,000)
Ending Balance, Assets		$ 12,000