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Employee Benefits (Narrative) (Details) - USD ($)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]      
Number of unearned ESOP shares 0 0  
Retirement savings 401(k) plan      
Defined Benefit Plan Disclosure [Line Items]      
Defined contribution plan, contribution $ 938,000 $ 810,000  
Supplemental retirement plan and deferred compensation arrangements      
Defined Benefit Plan Disclosure [Line Items]      
Deferred compensation arrangement with individual, compensation expense $ 676,000 $ 669,000 $ 730,000
Maximum [Member] | Retirement savings 401(k) plan      
Defined Benefit Plan Disclosure [Line Items]      
Percentage employer matching contribution 5.00%    
Up to 4% of participant contributions | Retirement savings 401(k) plan      
Defined Benefit Plan Disclosure [Line Items]      
Percentage of participant contributions 4.00%    
Percentage employer matching contribution 100.00%    
5%-6% of participant contributions | Retirement savings 401(k) plan      
Defined Benefit Plan Disclosure [Line Items]      
Percentage employer matching contribution 50.00%    
5%-6% of participant contributions | Minimum [Member] | Retirement savings 401(k) plan      
Defined Benefit Plan Disclosure [Line Items]      
Percentage of participant contributions 5.00%    
5%-6% of participant contributions | Maximum [Member] | Retirement savings 401(k) plan      
Defined Benefit Plan Disclosure [Line Items]      
Percentage of participant contributions 6.00%