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Long-Term Obligations (Tables)
3 Months Ended
Mar. 31, 2017
Debt Instrument [Line Items]  
Schedule of Long-term Debt Instruments [Table Text Block]
Long-term obligations consisted of the following at March 31, 2017 (in thousands):

 
March 31, 2017
Senior Note matures in 2020, variable interest rate
$
75,000

Less: current portion of long-term obligations

Long-term obligations, net
$
75,000