Other Comprehensive Income (Loss) (Schedule of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive income, Beginning Balance	$ 11,195	$ 423	$ 3,812	$ 2,890
Other Comprehensive Income (Loss) Before Reclassification	1,228	4,161	9,240	2,165
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)	(298)	0	(927)	(471)
Total Other Comprehensive Income (Loss)	930	4,161	8,313	1,694
Accumulated other comprehensive income, Ending Balance	12,125	4,584	12,125	4,584
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	11,273	491	3,890	2,958
Other Comprehensive Income (Loss) Before Reclassification	1,228	4,161	9,240	2,165
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)	(298)	0	(927)	(471)
Total Other Comprehensive Income (Loss)	930	4,161	8,313	1,694
Accumulated other comprehensive income, Ending Balance	12,203	4,652	12,203	4,652
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	(78)	(68)	(78)	(68)
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	$ (78)	$ (68)	$ (78)	$ (68)