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Accumulated Other Comprehensive Loss (Amounts Reclassified out of Each Component of Accumulated Other Comprehensive Loss) (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Unrealized gains and losses on sale of securities:        
Net realized gains on available for sale securities $ 36 $ 8 $ (177)
Provision for income tax expense (12) (3) 60
Net of tax 24 $ 5 (117)
Amortization of defined benefit items        
Amortization of prior year service cost [1]     5
Provision for income tax expense [1]     (2)
Net of tax [1]     3
Total reclassifications for the period $ 24 $ 5 [1] $ (114) [1]
[1] These accumulated other comprehensive loss components are included in the computation of net periodic benefit cost (see Note 16 for additional details).