Loans and Asset Quality Information (Schedule of Applied Cost Recovery Method of Purchased Impaired Loans) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Purchased impaired loans (substantially all of which are covered loans)
Balance, beginning, carrying value	$ 2,597	$ 3,142
Change due to payments received	(385)	(826)
Transfer to foreclosed real estate	$ (95)
Change due to loan charge-off		(31)
Other		312
Balance, ending, carrying value	$ 2,117	2,597
Contractual Principal Receivable [Member]
Purchased impaired loans (substantially all of which are covered loans)
Balance, beginning, contractual principal	5,859	6,263
Change due to payments received	(330)	(599)
Transfer to foreclosed real estate	(431)
Change due to loan charge-off		(2)
Other	(3)	197
Balance, ending, contractual principal	5,095	5,859
Fair Value Adjustment Write Down [Member]
Purchased impaired loans (substantially all of which are covered loans)
Balance, beginning, FMV	3,262	3,121
Change due to payments received	55	227
Transfer to foreclosed real estate	(336)
Change due to loan charge-off		29
Other	(3)	(115)
Balance, ending, FMV	$ 2,978	$ 3,262