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Investment in Investees (Tables)
 3 Months Ended
Mar. 31, 2018
Investment in Investee [Abstract]  
Equity Method Investments [Table Text Block]
The carrying value, estimated fair value and approximate equity percentage for the Company's investment in investee at March 31, 2018 and December 31, 2017 were as follows:
(in thousands, except for percentages)
 
 
 
 
 
 
March 31, 2018
 
December 31, 2017
 
 
Equity Percentage
 
Estimated Fair Value
 
Carrying Value
 
Equity Percentage
 
Estimated Fair Value
 
Carrying Value
ICL
 
31.2
%
 
$
3,354

 
$
5,331

 
31.2
%
 
$
3,816

 
$
5,230