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Employee Benefit Plans (Detail Textuals) - USD ($)
$ in Thousands
3 Months Ended
Sep. 30, 2016
Dec. 31, 2015
Defined Benefit Plan Disclosure [Line Items]    
Settlement expense   $ 1,700
401(k) retirement savings plan    
Defined Benefit Plan Disclosure [Line Items]    
Contribution percentage 3.00%  
Maximum additional discretionary contribution percentage 4.00%  
Domestic noncontributory defined benefit pension plan    
Defined Benefit Plan Disclosure [Line Items]    
Pension curtailment gain $ 6,822