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Premises and Equipment (Details) - USD ($)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Property Plant And Equipment Line Items    
Property Plant And Equipment Gross $ 127,078,000 $ 133,271,000
Accumulated depreciation and amortization (52,488,000) (52,672,000)
Total Premises and Equipment, net 74,590,000 80,599,000
Land And Land Improvements    
Property Plant And Equipment Line Items    
Property Plant And Equipment Gross 5,638,000 $ 5,680,000
Land And Land Improvements | Minimum [Member]    
Property Plant And Equipment Line Items    
Property Plant And Equipment Useful Life   0 years
Land And Land Improvements | Maximum [Member]    
Property Plant And Equipment Line Items    
Property Plant And Equipment Useful Life   0 years
Building And Building Improvements    
Property Plant And Equipment Line Items    
Property Plant And Equipment Gross $ 64,392,000 $ 65,430,000
Building And Building Improvements | Minimum [Member]    
Property Plant And Equipment Line Items    
Property Plant And Equipment Useful Life 0 years 0 years
Building And Building Improvements | Maximum [Member]    
Property Plant And Equipment Line Items    
Property Plant And Equipment Useful Life 40 years 40 years
Leasehold Improvements    
Property Plant And Equipment Line Items    
Property Plant And Equipment Gross $ 20,166,000 $ 23,000,000
Leasehold Improvements | Minimum [Member]    
Property Plant And Equipment Line Items    
Property Plant And Equipment Useful Life 5 years 5 years
Leasehold Improvements | Maximum [Member]    
Property Plant And Equipment Line Items    
Property Plant And Equipment Useful Life 10 years 10 years
Furniture And Fixtures    
Property Plant And Equipment Line Items    
Property Plant And Equipment Gross $ 13,656,000 $ 12,739,000
Furniture And Fixtures | Minimum [Member]    
Property Plant And Equipment Line Items    
Property Plant And Equipment Useful Life 3 years 3 years
Furniture And Fixtures | Maximum [Member]    
Property Plant And Equipment Line Items    
Property Plant And Equipment Useful Life 7 years 7 years
Software And Software Development Costs    
Property Plant And Equipment Line Items    
Property Plant And Equipment Gross $ 23,226,000 $ 26,422,000
Software And Software Development Costs | Minimum [Member]    
Property Plant And Equipment Line Items    
Property Plant And Equipment Useful Life 3 years 3 years
Software And Software Development Costs | Maximum [Member]    
Property Plant And Equipment Line Items    
Property Plant And Equipment Useful Life 7 years 7 years