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Investment And Other Gains Investment And Other Gains (Tables)
 12 Months Ended
Dec. 31, 2015
Investment And Other Gains [Abstract]  
Schedule of Investment And Other Gains [Table Text Block]
The following table summarizes our investment and other gains (in thousands):
 
Year Ended December 31,
 
2015
 
2014
 
2013
Gains on sales of marketable securities
23,529

 
—

 
—

Gain on sale of real estate
1,126

 
—

 
—

Gain on purchase liability settlement
—

 
—

 
3,256

Other gains
—

 
—

 
50

 
$
24,655

 
$
—

 
$
3,306