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Accrued Interest and Other Assets (Narratives) (Details) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Other assets [Line Items]    
Other prepaid expenses $ 15,496 $ 17,096
Prepaid Taxes 11,400 12,500
Other Intangible Assets 4,000 4,300
Other repossessed assets 3,269 3,224
Repossessed auto 3,100 3,000
Mortgage tax credits 6,277 6,277
Customer Relationships [Member]    
Other assets [Line Items]    
Other Intangible Assets $ 1,800 $ 1,900