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Employee Benefit Plans (Schedule of Target Asset Allocations) (Details)
12 Months Ended
Dec. 31, 2015
Cash and Cash Equivalents [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Defined Benefit Plan, Target Plan Asset Allocations 5.00%
Defined Benefit Plan, Target Plan Asset Allocations Range Minimum 0.00%
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum 20.00%
Fixed Income Securities [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Defined Benefit Plan, Target Plan Asset Allocations 40.00%
Defined Benefit Plan, Target Plan Asset Allocations Range Minimum 30.00%
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum 50.00%
Equity Securities [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Defined Benefit Plan, Target Plan Asset Allocations 55.00%
Defined Benefit Plan, Target Plan Asset Allocations Range Minimum 45.00%
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum 65.00%