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AOCI (Tables)
 12 Months Ended
Dec. 31, 2017
Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Components of accumulated other comprehensive income
 
Foreign Currency Derivative Activities(A)
 
Post Retirement Benefit Plan Items(B)
 
Total
2016:
 
 
 
 
 
Balance at January 1, 2016
$
—

 
$
2,645,000

 
$
2,645,000

Other comprehensive income before reclassifications
(289,000
)
 
319,000

 
30,000

Amounts reclassified from accumulated other comprehensive income
(14,000
)
 
(336,000
)
 
(350,000
)
Income tax (expense) benefit
103,000

 
(14,000
)
 
89,000

Balance at December 31, 2016
$
(200,000
)
 
$
2,614,000

 
$
2,414,000

 
 
 
 
 
 
2017:
 
 
 
 
 
Balance at January 1, 2017
$
(200,000
)
 
$
2,614,000

 
$
2,414,000

Other comprehensive income before reclassifications
517,000

 
(417,000
)
 
100,000

Amounts reclassified from accumulated other comprehensive income
(512,000
)
 
(347,000
)
 
(859,000
)
Income tax (expense) benefit
(2,000
)
 
255,000

 
253,000

Adoption of Accounting Standards Update 2018-02
—

 
162,000

 
162,000

Balance at December 31, 2017
$
(197,000
)
 
$
2,267,000

 
$
2,070,000