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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 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Unrealized gains and losses on sale of securities:        
Net realized gains on available for sale securities $ (28) $ (120) $ (28) $ (177)
Provision for income tax expense 10 41 10 60
Net of tax (18) (79) $ (18) (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 $ (18) $ (79) $ (18) $ (114)
[1] These accumulated other comprehensive loss components are included in the computation of net periodic benefit cost (see Note 16 for additional details).