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LItigation Settlement and Supplemental Operating Information (Tables)
 12 Months Ended
Dec. 31, 2013
Other Nonoperating Income (Expense) [Abstract]  
Schedule of Other Nonoperating Income (Expense) [Table Text Block]
Other nonoperating income (expense), net, included in the statements of operations follows:
 
Year Ended December 31,
 
2013
 
2012
 
2011
Other nonoperating income (expense), net
$
(2,827
)
 
$
(2,611
)
 
$
(2,850
)