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Employee Benefit Plans (Schedule of Fair Value of Pension Plan Assets) (Details) - Pension Benefit Plan [Member] - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 52,931 $ 51,623 $ 46,443
Mutual Funds - Small Cap Core [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 251 261  
Mutual Funds - Small Cap Growth [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 217    
Mutual Funds - Small Cap Value [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,107 876  
Mutual Funds - Mid Cap Core [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 998 1,013  
Mutual Funds - Mid Cap Value [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 606 627  
Mutual Funds - Large Cap Blend [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 955 1,187  
Mutual Funds - Large Cap Core [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 15,432 15,321  
Mutual Funds - Foreign Large Core [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 284 989  
Mutual Funds - Foreign Large Growth [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   449  
Mutual Funds - Foreign Large Blend [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3,775 2,566  
Mutual Funds - Diversified Emerging Markets [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   737  
Mutual Funds - Intermediate Term Bond [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 8,707 9,824  
Mutual Funds - World Bond [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 11,291 8,668  
Money Market Funds - Cash and Cash Equivalents [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 652 513  
Common Equity Securities - Non-Financial Services [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 202 280  
Common Equity Securities - Financial Services [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,704 1,656  
Common Equity Securities - Utilities [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,754 1,504  
Common Equity Securities - Consumer Growth [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,191 1,123  
Common Equity Securities - Consumer Staples [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 553 459  
Common Equity Securities - Consumer Cyclicals [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 946 922  
Common Equity Securities - Industrial Resources [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 284 155  
Common Equity Securities - Capital Equipment [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 527 453  
Common Equity Securities - Technology [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,118 1,328  
Common Equity Securities - Energy [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 377 712  
Fair Value, Level 1 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 52,931 51,237  
Fair Value, Level 1 [Member] | Mutual Funds - Small Cap Core [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 251 261  
Fair Value, Level 1 [Member] | Mutual Funds - Small Cap Growth [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 217    
Fair Value, Level 1 [Member] | Mutual Funds - Small Cap Value [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,107 876  
Fair Value, Level 1 [Member] | Mutual Funds - Mid Cap Core [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 998 1,013  
Fair Value, Level 1 [Member] | Mutual Funds - Mid Cap Value [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 606 627  
Fair Value, Level 1 [Member] | Mutual Funds - Large Cap Blend [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 955 1,187  
Fair Value, Level 1 [Member] | Mutual Funds - Large Cap Core [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 15,432 15,321  
Fair Value, Level 1 [Member] | Mutual Funds - Foreign Large Core [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 284 989  
Fair Value, Level 1 [Member] | Mutual Funds - Foreign Large Growth [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   449  
Fair Value, Level 1 [Member] | Mutual Funds - Foreign Large Blend [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 3,775 2,566  
Fair Value, Level 1 [Member] | Mutual Funds - Diversified Emerging Markets [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets   737  
Fair Value, Level 1 [Member] | Mutual Funds - Intermediate Term Bond [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 8,707 9,824  
Fair Value, Level 1 [Member] | Mutual Funds - World Bond [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 11,291 8,668  
Fair Value, Level 1 [Member] | Money Market Funds - Cash and Cash Equivalents [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 652 127  
Fair Value, Level 1 [Member] | Common Equity Securities - Non-Financial Services [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 202 280  
Fair Value, Level 1 [Member] | Common Equity Securities - Financial Services [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,704 1,656  
Fair Value, Level 1 [Member] | Common Equity Securities - Utilities [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,754 1,504  
Fair Value, Level 1 [Member] | Common Equity Securities - Consumer Growth [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,191 1,123  
Fair Value, Level 1 [Member] | Common Equity Securities - Consumer Staples [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 553 459  
Fair Value, Level 1 [Member] | Common Equity Securities - Consumer Cyclicals [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 946 922  
Fair Value, Level 1 [Member] | Common Equity Securities - Industrial Resources [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 284 155  
Fair Value, Level 1 [Member] | Common Equity Securities - Capital Equipment [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 527 453  
Fair Value, Level 1 [Member] | Common Equity Securities - Technology [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 1,118 1,328  
Fair Value, Level 1 [Member] | Common Equity Securities - Energy [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 377 712  
Fair Value, Level 2 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 386  
Fair Value, Level 2 [Member] | Mutual Funds - Small Cap Core [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets  
Fair Value, Level 2 [Member] | Mutual Funds - Small Cap Growth [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets    
Fair Value, Level 2 [Member] | Mutual Funds - Small Cap Value [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets  
Fair Value, Level 2 [Member] | Mutual Funds - Mid Cap Core [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets  
Fair Value, Level 2 [Member] | Mutual Funds - Mid Cap Value [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets  
Fair Value, Level 2 [Member] | Mutual Funds - Large Cap Blend [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets  
Fair Value, Level 2 [Member] | Mutual Funds - Large Cap Core [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets  
Fair Value, Level 2 [Member] | Mutual Funds - Foreign Large Core [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets  
Fair Value, Level 2 [Member] | Mutual Funds - Foreign Large Blend [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets  
Fair Value, Level 2 [Member] | Mutual Funds - Diversified Emerging Markets [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets    
Fair Value, Level 2 [Member] | Mutual Funds - Intermediate Term Bond [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets  
Fair Value, Level 2 [Member] | Mutual Funds - World Bond [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets  
Fair Value, Level 2 [Member] | Money Market Funds - Cash and Cash Equivalents [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 386  
Fair Value, Level 2 [Member] | Common Equity Securities - Non-Financial Services [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets  
Fair Value, Level 2 [Member] | Common Equity Securities - Financial Services [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets  
Fair Value, Level 2 [Member] | Common Equity Securities - Utilities [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets  
Fair Value, Level 2 [Member] | Common Equity Securities - Consumer Growth [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets  
Fair Value, Level 2 [Member] | Common Equity Securities - Consumer Staples [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets  
Fair Value, Level 2 [Member] | Common Equity Securities - Consumer Cyclicals [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets  
Fair Value, Level 2 [Member] | Common Equity Securities - Industrial Resources [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets  
Fair Value, Level 2 [Member] | Common Equity Securities - Capital Equipment [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets  
Fair Value, Level 2 [Member] | Common Equity Securities - Technology [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets  
Fair Value, Level 2 [Member] | Common Equity Securities - Energy [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets  
Fair Value, Level 3 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets  
Fair Value, Level 3 [Member] | Mutual Funds - Small Cap Core [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets  
Fair Value, Level 3 [Member] | Mutual Funds - Small Cap Growth [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets    
Fair Value, Level 3 [Member] | Mutual Funds - Small Cap Value [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets  
Fair Value, Level 3 [Member] | Mutual Funds - Mid Cap Core [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets  
Fair Value, Level 3 [Member] | Mutual Funds - Mid Cap Value [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets  
Fair Value, Level 3 [Member] | Mutual Funds - Large Cap Blend [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets  
Fair Value, Level 3 [Member] | Mutual Funds - Large Cap Core [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets  
Fair Value, Level 3 [Member] | Mutual Funds - Foreign Large Core [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets  
Fair Value, Level 3 [Member] | Mutual Funds - Foreign Large Blend [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets  
Fair Value, Level 3 [Member] | Mutual Funds - Diversified Emerging Markets [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets    
Fair Value, Level 3 [Member] | Mutual Funds - Intermediate Term Bond [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets  
Fair Value, Level 3 [Member] | Mutual Funds - World Bond [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets  
Fair Value, Level 3 [Member] | Money Market Funds - Cash and Cash Equivalents [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets  
Fair Value, Level 3 [Member] | Common Equity Securities - Non-Financial Services [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets  
Fair Value, Level 3 [Member] | Common Equity Securities - Financial Services [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets  
Fair Value, Level 3 [Member] | Common Equity Securities - Utilities [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets  
Fair Value, Level 3 [Member] | Common Equity Securities - Consumer Growth [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets  
Fair Value, Level 3 [Member] | Common Equity Securities - Consumer Staples [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets  
Fair Value, Level 3 [Member] | Common Equity Securities - Consumer Cyclicals [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets  
Fair Value, Level 3 [Member] | Common Equity Securities - Industrial Resources [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets  
Fair Value, Level 3 [Member] | Common Equity Securities - Capital Equipment [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets  
Fair Value, Level 3 [Member] | Common Equity Securities - Technology [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets  
Fair Value, Level 3 [Member] | Common Equity Securities - Energy [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets