Summary Of Significant Accounting Policies Summary of Significant Accounting Policies (Disposition of Available-for-Sale Securities) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Disposition of Available for Sale Securities [Abstract]
Proceeds from Sale of Available-for-sale Securities	$ 3,209	$ 8,130	$ 14,612	$ 15,130
Available-for-sale Securities, Gross Realized Gains	0	16	3	18
Available-for-sale Securities, Gross Realized Losses	$ (735)	$ 0	$ (735)	$ 0