Income Taxes (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Foreign Federal [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$ 3.8	$ 3.8
Foreign Federal 2033 [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$ 8.0	2.3
Expiration date	Dec. 31, 2033
State [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$ 1.0	$ 0.3
Expiration date	Dec. 31, 2033
Canadian Provincial [Member]
Income Tax Examination [Line Items]
Total reassessments including interest	$ 80.0
Amount of security posted in the form of a performance bond	50.0
Amount of security posted in the form of cash	$ 28.0
Canadian Provincial [Member] | Minimum [Member]
Income Tax Examination [Line Items]
Years under examination	2002
Canadian Provincial [Member] | Maximum [Member]
Income Tax Examination [Line Items]
Years under examination	2009
Canadian Federal and Provincial [Member] | Tax Year 2004 Through 2006 [Member]
Income Tax Examination [Line Items]
Amount of security posted in the form of a performance bond	$ 18.0
Total reassessment amount including penalty and interest	89.0
Amount of security in the form of a bank letter guarantee	36.0
Canadian Federal and Provincial [Member] | Tax Year 2007 Through 2008 [Member]
Income Tax Examination [Line Items]
Amount of security posted in the form of a performance bond	10.0
Total reassessment amount including penalty and interest	31.0
Amount of security in the form of a bank letter guarantee	$ 10.0
Canadian Federal and Provincial [Member] | Minimum [Member] | Tax Year 2004 Through 2006 [Member]
Income Tax Examination [Line Items]
Years under examination	2004
Canadian Federal and Provincial [Member] | Minimum [Member] | Tax Year 2007 Through 2008 [Member]
Income Tax Examination [Line Items]
Years under examination	2007
Canadian Federal and Provincial [Member] | Maximum [Member] | Tax Year 2004 Through 2006 [Member]
Income Tax Examination [Line Items]
Years under examination	2006
Canadian Federal and Provincial [Member] | Maximum [Member] | Tax Year 2007 Through 2008 [Member]
Income Tax Examination [Line Items]
Years under examination	2008