Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Pre-Tax Amount [Member]
Schedule Of Other Comprehesive Income [Line Items]
Unrealized Net Holding Gain (Loss) On All Other Securitiies	$ 10,553	$ (14,761)	$ 2,188
Reclassification adjustment for loss (gain) on securities recognized in earnings	530	(651)	(679)
Other Comprehensive Income (Loss)	11,083	(15,412)	1,509
Tax Benefit (Expense) [Member]
Schedule Of Other Comprehesive Income [Line Items]
Unrealized Net Holding Gain (Loss) On All Other Securitiies	(3,893)	5,446	(809)
Reclassification adjustment for loss (gain) on securities recognized in earnings	(195)	240	252
Other Comprehensive Income (Loss)	(4,088)	5,686	(557)
Net Of Tax Amount [Member]
Schedule Of Other Comprehesive Income [Line Items]
Unrealized Net Holding Gain (Loss) On All Other Securitiies	6,660	(9,315)	1,379
Reclassification adjustment for loss (gain) on securities recognized in earnings	335	(411)	(427)
Other Comprehensive Income (Loss)	$ 6,995	$ (9,726)	$ 952