Investments (Gross Unrealized Losses And Fair Value Of Investments) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Schedule of Investments [Line Items]
Securities available-for-sale, Less Than Twelve Months, Estimated Fair Value	$ 2,769	$ 142,874
Securities available-for-sale, Less Than Twelve Months, Unrealized Loss	125	867
Securities available-for-sale, Twelve Months or Greater, Estimated Fair Value	22,663	42,660
Securities available-for-sale, Twelve Months or Greater, Unrealized Loss	1,033	2,650
Securities available-for-sale, Total, Estimated Fair Value	25,432	185,534
Securities available-for-sale, Total, Unrealized Loss	1,158	3,517
Obligations Of States And Political Subdivisions [Member]
Schedule of Investments [Line Items]
Securities available-for-sale, Less Than Twelve Months, Estimated Fair Value	480	2,406
Securities available-for-sale, Less Than Twelve Months, Unrealized Loss	3	5
Securities available-for-sale, Twelve Months or Greater, Estimated Fair Value	0	128
Securities available-for-sale, Twelve Months or Greater, Unrealized Loss	0	2
Securities available-for-sale, Total, Estimated Fair Value	480	2,534
Securities available-for-sale, Total, Unrealized Loss	3	7
U.S. Government Agencies Mortgage-backed Securities [Member]
Schedule of Investments [Line Items]
Securities available-for-sale, Less Than Twelve Months, Estimated Fair Value	16	129,612
Securities available-for-sale, Less Than Twelve Months, Unrealized Loss	0	688
Securities available-for-sale, Twelve Months or Greater, Estimated Fair Value	17,020	34,044
Securities available-for-sale, Twelve Months or Greater, Unrealized Loss	128	1,333
Securities available-for-sale, Total, Estimated Fair Value	17,036	163,656
Securities available-for-sale, Total, Unrealized Loss	128	2,021
Corporate Securities [Member]
Schedule of Investments [Line Items]
Securities available-for-sale, Less Than Twelve Months, Estimated Fair Value	2,273	10,856
Securities available-for-sale, Less Than Twelve Months, Unrealized Loss	122	174
Securities available-for-sale, Twelve Months or Greater, Estimated Fair Value	1,025	2,231
Securities available-for-sale, Twelve Months or Greater, Unrealized Loss	4	147
Securities available-for-sale, Total, Estimated Fair Value	3,298	13,087
Securities available-for-sale, Total, Unrealized Loss	126	321
Money Market Funds [Member]
Schedule of Investments [Line Items]
Securities available-for-sale, Less Than Twelve Months, Estimated Fair Value		0
Securities available-for-sale, Less Than Twelve Months, Unrealized Loss		0
Securities available-for-sale, Twelve Months or Greater, Estimated Fair Value		1,488
Securities available-for-sale, Twelve Months or Greater, Unrealized Loss		13
Securities available-for-sale, Total, Estimated Fair Value		1,488
Securities available-for-sale, Total, Unrealized Loss		13
Asset-backed Securities [Member]
Schedule of Investments [Line Items]
Securities available-for-sale, Less Than Twelve Months, Estimated Fair Value	0	0
Securities available-for-sale, Less Than Twelve Months, Unrealized Loss	0	0
Securities available-for-sale, Twelve Months or Greater, Estimated Fair Value	4,618	4,769
Securities available-for-sale, Twelve Months or Greater, Unrealized Loss	901	1,155
Securities available-for-sale, Total, Estimated Fair Value	4,618	4,769
Securities available-for-sale, Total, Unrealized Loss	$ 901	$ 1,155