Segment Information Foreign Currency Exchange Rates (Details)	Sep. 30, 2017 $ / AUD	Sep. 30, 2017 $ / CAD	Sep. 30, 2017 $ / €	Sep. 30, 2017 $ / £	May 03, 2017 $ / AUD	Dec. 31, 2016 $ / AUD	Dec. 31, 2016 $ / CAD	Dec. 31, 2016 $ / €	Dec. 31, 2016 $ / £	Dec. 01, 2016 $ / AUD	Sep. 30, 2016 $ / AUD	Sep. 30, 2016 $ / CAD	Sep. 30, 2016 $ / €	Sep. 30, 2016 $ / £
Foreign currency exchange rate					1.29					0.74	0.74
Last day rate [Member] [Member]
Foreign currency exchange rate	0.78	0.80	1.18	1.34		0.72	0.74	1.06	1.23
Quarter to Date Average [Member]
Foreign currency exchange rate	0.79	0.80	1.17	1.31							0.76	0.77	1.12	1.31
Year to Date Average [Member]
Foreign currency exchange rate	0.77	0.77	1.11	1.28							0.74	0.76	1.12	1.39