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Retirement Plans (Narrative) (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2018
Defined Benefit Plan Disclosure [Line Items]    
Newly eligible associates initial savings rate   3.00%
Amended Hancock 401K Plan [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Period of employment for eligibility   3 years
Additional matching percentage   2.00%
First 1% Of Contribution Saved [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Matching percentage   100.00%
Percentage of compensation saved   1.00%
Next 5% Of Contribution Saved [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Matching percentage   50.00%
Percentage of compensation saved   5.00%
2% Of Contribution [Member] | Amended Hancock 401K Plan [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Matching percentage 2.00%  
4% Of Contribution [Member] | Amended Hancock 401K Plan [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Matching percentage 4.00%  
6% Of Contribution [Member] | Amended Hancock 401K Plan [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Matching percentage 6.00%