Debt Subsequent Event (Details) (Matariki Forestry Group [Member], USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2013
Senior Secured Facilities Agreement, Revolving Facilities due 2014 to 2016 [Member] | Minimum [Member]
Subsequent Event [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.775%
Senior Secured Facilities Agreement, Revolving Facilities due 2014 to 2016 [Member] | Maximum [Member]
Subsequent Event [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.05%
Amendment of Existing Senior Secured Revolving Credit Agreement [Member]
Subsequent Event [Line Items]
Subsequent Event, Date	Jul. 05, 2013
Subsequent Event, Description	the New Zealand JV negotiated amendments to the existing Senior Secured Facilities Agreement.
Amendment of Existing Senior Secured Revolving Credit Agreement [Member] | Senior Secured Facilities Agreement as Amended July 2013, Revolving Cash Advance Facility due 2016 [Member]
Subsequent Event [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 181
Debt Instrument, Maturity Date, Description	September 2016
Amendment of Existing Senior Secured Revolving Credit Agreement [Member] | Senior Secured Facilities Agreement as Amended July 2013, Revolving Cash Advance Facility due 2016 [Member] | Minimum [Member]
Subsequent Event [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.75%
Amendment of Existing Senior Secured Revolving Credit Agreement [Member] | Senior Secured Facilities Agreement as Amended July 2013, Revolving Cash Advance Facility due 2016 [Member] | Maximum [Member]
Subsequent Event [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.85%
Amendment of Existing Senior Secured Revolving Credit Agreement [Member] | Senior Secured Facilities Agreement as Amended July 2013, Working Capital Facility due 2014 [Member]
Subsequent Event [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 18
Debt Instrument, Maturity Date, Description	July 2014
Amendment of Existing Senior Secured Revolving Credit Agreement [Member] | Senior Secured Facilities Agreement as Amended July 2013 [Member]
Subsequent Event [Line Items]
Debt Instrument, Covenant Description	The maximum leverage ratio was increased to 40 percent and the interest coverage ratio was amended to allow a minimum ratio of 1.25 to 1, provided that the ratio is not below 1.50 to 1 for any two consecutive quarters.