Debt Senior Secured Facilities Agreement - Revolving Credit Facility Narrative (Details) (USD $)	12 Months Ended
	Dec. 31, 2013
Not Designated as Hedging Instrument [Member] | Interest rate swaps [Member]
Debt Instrument [Line Items]
Notional Amount	$ 183,851,000	[1]
Percentage of JV variable debt hedged by interest rate derivatives	95.00%	[1]
Weighted average interest rate	4.90%	[1]
Not Designated as Hedging Instrument [Member] | Interest rate swaps [Member] | Minimum [Member]
Debt Instrument [Line Items]
Remaining maturity	1 year
Not Designated as Hedging Instrument [Member] | Interest rate swaps [Member] | Maximum [Member]
Debt Instrument [Line Items]
Remaining maturity	7 years
Senior Secured Facilities Agreement as Amended July 2013, Revolving Cash Advance Facility due 2016 [Member] | Not Designated as Hedging Instrument [Member] | Interest rate swaps [Member]
Debt Instrument [Line Items]
Percentage of JV variable debt hedged by interest rate derivatives	95.00%
Senior Secured Facilities Agreement as Amended July 2013, Revolving Cash Advance Facility due 2016 [Member] | Matariki Forestry Group [Member]
Debt Instrument [Line Items]
Amount outstanding	$ 193,000,000
Interest rate during period	4.39%
Maturity date description	September 2016
Interest rate description	The interest rate is indexed to the 90 day New Zealand Bank bill rate and is generally repriced quarterly. The margin on the index rate fluctuates based on the interest coverage ratio

[1] All notional amounts are stated in thousands of dollars except fuel hedge contracts which are denominated in thousands of barrels.