Other Comprehensive Income (Loss) (Schedule of Accumulated Other Comprehensive Income) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive income, Beginning Balance	$ (162)	$ (1,539)	$ (5,263)	$ 10,351
Other Comprehensive Income (Loss) Before Reclassification	577	(1,134)	5,984	(12,192)
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)	(369)	(239)	(675)	(1,071)
Net Current Period Other Comprehensive Income (Loss)	208	(1,373)	5,309	(13,263)
Accumulated other comprehensive income, Ending Balance	46	(2,912)	46	(2,912)
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	(130)	(1,247)	(5,231)	10,643
Other Comprehensive Income (Loss) Before Reclassification	577	(1,134)	5,984	(12,192)
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)	(369)	(239)	(675)	(1,071)
Net Current Period Other Comprehensive Income (Loss)	208	(1,373)	5,309	(13,263)
Accumulated other comprehensive income, Ending Balance	78	(2,620)	78	(2,620)
Defined Benefit Pension Items
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive income, Beginning Balance	0	(231)	0	(231)
Other Comprehensive Income (Loss) Before Reclassification	0	0	0	0
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)	0	0	0	0
Net Current Period Other Comprehensive Income (Loss)	0	0	0	0
Accumulated other comprehensive income, Ending Balance	0	(231)	0	(231)
Postretirement Benefit Items
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive income, Beginning Balance	(32)	(61)	(32)	(61)
Other Comprehensive Income (Loss) Before Reclassification	0	0	0	0
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)	0	0	0	0
Net Current Period Other Comprehensive Income (Loss)	0	0	0	0
Accumulated other comprehensive income, Ending Balance	$ (32)	$ (61)	$ (32)	$ (61)