Other Comprehensive Income (Loss) (Schedule of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive income, Beginning Balance	$ 7,841	$ 6,387	$ 3,812	$ 2,890
Other Comprehensive Income (Loss) Before Reclassification	3,983	(5,794)	8,012	(1,996)
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)	(629)	(170)	(629)	(471)
Total Other Comprehensive Income (Loss)	3,354	(5,964)	7,383	(2,467)
Accumulated other comprehensive income, Ending Balance	11,195	423	11,195	423
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	7,919	6,455	3,890	2,958
Other Comprehensive Income (Loss) Before Reclassification	3,983	(5,794)	8,012	(1,996)
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)	(629)	(170)	(629)	(471)
Total Other Comprehensive Income (Loss)	3,354	(5,964)	7,383	(2,467)
Accumulated other comprehensive income, Ending Balance	11,273	491	11,273	491
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)