Income Taxes (Tables)
 9 Months Ended
Sep. 30, 2016
Income Taxes [Abstract]  
Summary of Income Tax Contingencies [Table Text Block]
A reconciliation of the September 30, 2016 and 2015 amounts of unrecognized tax benefits are as follows (in thousands):

 
 
2016
 
2015
Balance at January 1
 
$
6,000

 
$
5,200

Additions for tax position related to the current year
 
—

 
—

Reductions for tax positions related to the current year
 
—

 
—

Additions for tax positions of prior years
 
—

 
—

Reductions for tax positions
 
(1,200
)
 
(100
)
Balance at September 30
 
$
4,800

 
$
5,100