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COMPREHENSIVE INCOME
 6 Months Ended
Jun. 30, 2018
COMPREHENSIVE INCOME [Abstract]  
Comprehensive Income (Loss) Note [Text Block]
COMPREHENSIVE INCOME
 
Total Comprehensive Income is comprised of net income plus all other changes in equity from non-owner sources and is presented on the Consolidated Statements of Income and Comprehensive Income. The components of Accumulated other comprehensive income are presented in the Company's Consolidated Statement of Changes in Equity and are summarized below. See Note 13 for information regarding the Company's interest rate swaps.
 
Three Months Ended
June 30,
 
Six Months Ended
June 30,
 
2018
 
2017
 
2018
 
2017
 
(In thousands)
ACCUMULATED OTHER COMPREHENSIVE INCOME:
 
 
 
Balance at beginning of period
$
8,954

 
3,405

 
5,348

 
1,995

    Change in fair value of interest rate swaps - cash flow hedges
1,186

 
(984
)
 
4,792

 
426

Balance at end of period
$
10,140

 
2,421

 
10,140

 
2,421