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Long-term Debt (Details Textual)
$ in Millions
 12 Months Ended
Dec. 31, 2015
USD ($)
Debt Instrument [Line Items]  
Debt Instrument, Face Amount $ 111
Debt Instrument, Term 5 years
Debt Instrument, Interest Rate During Period 1.20%
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months $ 22
Long-term Debt, Maturities, Repayments of Principal in Year Two 22
Long-term Debt, Maturities, Repayments of Principal in Year Three 22
Long-term Debt, Maturities, Repayments of Principal in Year Four 22
Long-term Debt, Maturities, Repayments of Principal in Year Five $ 11