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Employee Benefit Plans (Detail Textuals) - USD ($)
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Compensation and Retirement Disclosure [Abstract]          
Employer match 3.00%        
Defined benefit plan contributions by employer percent 6.00%        
Contribution to the defined benefit plan for the current plan year $ 772,000        
Defined benefit plan contributions minimum required contribution 842,000        
Estimated prior service cost for the defined benefit pension plan that will be amortized from accumulated other comprehensive income into net periodic cost $ 79,000        
Assumed overall expected long-term rate of return on pension plan assets (in percent) 7.00% 7.00% 7.00%    
Annual return on plan assets 8.20% (0.40%) 8.30% 19.10% 11.40%
Employer contribution $ 772,000 $ 716,000      
Employer contribution by September 2017 1,200,000        
Defined benefit obligation expense in 2017 $ 1,400,000