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Indebtedness	9 Months Ended
Indebtedness	Sep. 30, 2016
Indebtedness [Abstract]
Long-term Debt [Text Block]	Indebtedness In September 2016, the Company issued $400 million of 3.25% senior unsecured notes due 2026. The Company used a substantial portion of the net proceeds from these notes to prepay its 5.5% Senior Notes due December 2016 in the amount of $300 million. This prepayment resulted in a $3.8 million loss on debt extinguishment.