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Retirement Plans (Narrative) (Details)
3 Months Ended
Mar. 31, 2018
Jun. 30, 2017
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%