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Employee Benefit Plans (Schedule of Fair Value of Plan Assets) (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Quoted Prices in Market for Identical Assets (Level 1) [Member]    
Fair value of plan assets $ 27,360 $ 35,334
Significant Other Observable Inputs (Level 2) [Member]    
Fair value of plan assets 9,590 155
Fair Value Total [Member]    
Fair value of plan assets 36,950 35,489
Fixed income investments - Money market funds [Member] | Quoted Prices in Market for Identical Assets (Level 1) [Member]    
Fair value of plan assets
Fixed income investments - Money market funds [Member] | Significant Other Observable Inputs (Level 2) [Member]    
Fair value of plan assets 9,590 155
Fixed income investments - Money market funds [Member] | Fair Value Total [Member]    
Fair value of plan assets 9,590 155
Equity investments - Large cap value fund [Member] | Quoted Prices in Market for Identical Assets (Level 1) [Member]    
Fair value of plan assets 15,595 14,703
Equity investments - Large cap value fund [Member] | Significant Other Observable Inputs (Level 2) [Member]    
Fair value of plan assets
Equity investments - Large cap value fund [Member] | Fair Value Total [Member]    
Fair value of plan assets 15,595 14,703
Equity investments - Small cap growth fund [Member] | Quoted Prices in Market for Identical Assets (Level 1) [Member]    
Fair value of plan assets 2,624 2,845
Equity investments - Small cap growth fund [Member] | Significant Other Observable Inputs (Level 2) [Member]    
Fair value of plan assets
Equity investments - Small cap growth fund [Member] | Fair Value Total [Member]    
Fair value of plan assets 2,624 2,845
Equity investments - Mid cap growth fund [Member] | Quoted Prices in Market for Identical Assets (Level 1) [Member]    
Fair value of plan assets 3,220 3,541
Equity investments - Mid cap growth fund [Member] | Significant Other Observable Inputs (Level 2) [Member]    
Fair value of plan assets
Equity investments - Mid cap growth fund [Member] | Fair Value Total [Member]    
Fair value of plan assets 3,220 3,541
Equity investments - Foreign equity fund [Member] | Quoted Prices in Market for Identical Assets (Level 1) [Member]    
Fair value of plan assets 2,669 3,544
Equity investments - Foreign equity fund [Member] | Significant Other Observable Inputs (Level 2) [Member]    
Fair value of plan assets
Equity investments - Foreign equity fund [Member] | Fair Value Total [Member]    
Fair value of plan assets 2,669 3,544
Equity investments - Company stock [Member] | Quoted Prices in Market for Identical Assets (Level 1) [Member]    
Fair value of plan assets 3,252 2,246
Equity investments - Company stock [Member] | Significant Other Observable Inputs (Level 2) [Member]    
Fair value of plan assets
Equity investments - Company stock [Member] | Fair Value Total [Member]    
Fair value of plan assets $ 3,252 2,246
Fixed income investments - US government bond fund [Member] | Quoted Prices in Market for Identical Assets (Level 1) [Member]    
Fair value of plan assets   3,398
Fixed income investments - US government bond fund [Member] | Significant Other Observable Inputs (Level 2) [Member]    
Fair value of plan assets  
Fixed income investments - US government bond fund [Member] | Fair Value Total [Member]    
Fair value of plan assets   3,398
Fixed income investments - US corporate bond fund [Member] | Quoted Prices in Market for Identical Assets (Level 1) [Member]    
Fair value of plan assets   3,357
Fixed income investments - US corporate bond fund [Member] | Significant Other Observable Inputs (Level 2) [Member]    
Fair value of plan assets  
Fixed income investments - US corporate bond fund [Member] | Fair Value Total [Member]    
Fair value of plan assets   3,357
Fixed income investments - US corporate high yield bond fund [Member] | Quoted Prices in Market for Identical Assets (Level 1) [Member]    
Fair value of plan assets   1,700
Fixed income investments - US corporate high yield bond fund [Member] | Significant Other Observable Inputs (Level 2) [Member]    
Fair value of plan assets  
Fixed income investments - US corporate high yield bond fund [Member] | Fair Value Total [Member]    
Fair value of plan assets   $ 1,700