Annual report pursuant to Section 13 and 15(d)

Financial Instruments - Narrative (Details)

v3.7.0.1
Financial Instruments - Narrative (Details)
$ in Millions
Dec. 31, 2015
USD ($)
Secured Debt | Industrial Development Bond | Level 2  
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]  
Fair value of outstanding debt $ 10.0