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Income Taxes (Narratives) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Income Taxes [Abstract]          
Statutary tax rate     39.00% 39.00%  
Unrecognized Tax Benefits, Interest on Income Taxes Accrued $ 80   $ 80   $ 229
Deferred Tax Assets, Net 116,199   116,199   124,200
OtherComprehensiveIncomeLossTax (569)       (983)
Income Tax Expense (Benefit) 3,993 $ 5,858 13,197 $ 11,519  
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued 2,100   2,100   2,000
Residual tax effect from OIB's change in applicable tax rate AFS $ 95 $ 8 $ 103 $ 16  
Effective tax rate     28.80% 29.00%  
International Banking Entity [Member]          
OtherComprehensiveIncomeLossTax     $ 6   $ 109