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Pension and Other Benefits (Details) - Schedule of Retrospective Application to Consolidated Statement of Condition - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
As previously reported [Member]    
Other components of net periodic pension expense
Salaries and employee benefits 35,128 31,030
As reported under the new guidance [Member]    
Other components of net periodic pension expense 250 304
Salaries and employee benefits $ 34,878 $ 30,726