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Segment Reporting (Business Segment Assets) (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Segment Reporting Information [Line Items]      
Goodwill $ 66,417 $ 60,402 $ 61,153
Other intangible assets, net 9,223 6,544  
Assets 3,710,340 3,381,024  
Banking [Member]      
Segment Reporting Information [Line Items]      
Goodwill 48,536 48,536 48,536
Other intangible assets, net 579 829  
Assets 3,678,230 3,356,987  
Non-Banking [Member]      
Segment Reporting Information [Line Items]      
Goodwill 17,881 11,866 $ 12,617
Other intangible assets, net 8,644 5,715  
Assets 31,166 20,315  
Holding Company and Other [Member]      
Segment Reporting Information [Line Items]      
Assets $ 944 $ 3,722