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Related Party Transactions (Split Dollar Agreements) (Narrative) (Details) - Split Dollar Life Insurance [Member] - USD ($)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Chief Executive Officer [Member]      
Related Party Transaction [Line Items]      
Payments for life insurance policies $ 700,000   $ 0
Proceeds from (payments for) life insurance policies   $ 100,000  
Chief Executive Officer [Member] | Maximum [Member]      
Related Party Transaction [Line Items]      
Life insurance, face amount 75,000,000    
Chairman, Board of Directors [Member]      
Related Party Transaction [Line Items]      
Payments for life insurance policies 1,100,000 1,100,000  
Proceeds from (payments for) life insurance policies     $ (1,200,000)
Chairman, Board of Directors [Member] | Maximum [Member]      
Related Party Transaction [Line Items]      
Life insurance, face amount 200,000,000    
Executive Officers [Member] | Other Long-Term Assets [Member]      
Related Party Transaction [Line Items]      
Life insurance assets, carrying amount $ 13,000,000 $ 11,100,000