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Employee Benefit Plans (Employee Benefit Reconciliation) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Service cost $ 240 $ 271 $ 253
Interest cost 3,394 3,465 3,315
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]      
Fair value of plan assets at beginning of year 73,431    
Fair value of plan assets at end of year 67,168 73,431  
Pension Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Accumulated Benefit Obligation 78,437 91,107  
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Projected benefit obligation at beginning of year 91,107 75,946  
Service cost 240 271  
Interest cost 3,394 3,465  
Actuarial (gain) loss (11,806) 16,546  
Benefits paid (1,620) (1,414)  
Settlement (2,878) (3,707)  
Projected benefit obligation at end of year 78,437 91,107 75,946
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]      
Fair value of plan assets at beginning of year 73,431 76,442  
Actual gain on plan assets (1,765) 2,110  
Benefits paid (1,620) (1,414)  
Settlement (2,878) (3,707)  
Fair value of plan assets at end of year 67,168 73,431 $ 76,442
Funded status $ (11,269) $ (17,676)