Other Comprehensive Income (Loss) (Schedule of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive income, Beginning Balance	$ 423	$ (162)	$ 2,890	$ (5,263)
Other Comprehensive Income (Loss) Before Reclassification	4,161	577	2,165	5,984
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)	0	(369)	(471)	(675)
Total Other Comprehensive Income (Loss)	4,161	208	1,694	5,309
Accumulated other comprehensive income, Ending Balance	4,584	46	4,584	46
Unrealized Gains and Losses on Available-for-Sale Securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive income, Beginning Balance	491	(130)	2,958	(5,231)
Other Comprehensive Income (Loss) Before Reclassification	4,161	577	2,165	5,984
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)	0	(369)	(471)	(675)
Total Other Comprehensive Income (Loss)	4,161	208	1,694	5,309
Accumulated other comprehensive income, Ending Balance	4,652	78	4,652	78
Defined Benefit Pension Items
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive income, Beginning Balance	0	0	0	0
Other Comprehensive Income (Loss) Before Reclassification	0	0	0	0
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)	0	0	0	0
Total Other Comprehensive Income (Loss)	0	0	0	0
Accumulated other comprehensive income, Ending Balance	0	0	0	0
Postretirement Benefit Items
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive income, Beginning Balance	(68)	(32)	(68)	(32)
Other Comprehensive Income (Loss) Before Reclassification	0	0	0	0
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)	0	0	0	0
Total Other Comprehensive Income (Loss)	0	0	0	0
Accumulated other comprehensive income, Ending Balance	$ (68)	$ (32)	$ (68)	$ (32)