DEBT - Subsequent Event (Details) NZD in Millions	Aug. 05, 2015 USD ($) advance	Aug. 05, 2015 NZD advance	Aug. 05, 2015 NZD	Jun. 30, 2015 USD ($)	Dec. 31, 2014 USD ($)
Debt Instrument [Line Items]
Long-term debt				$ 722,353,000	$ 621,849,000
Senior Notes [Member] | Senior Exchangeable Notes due 2015 [Member]
Debt Instrument [Line Items]
Long-term debt				$ 100,000,000
Subsequent Event [Member]
Debt Instrument [Line Items]
Transaction fees to be repaid	$ 2,000,000
Proceeds for cash and general corporate purposes	$ 12,000,000
Subsequent Event [Member] | New Zealand [Member]
Debt Instrument [Line Items]
Foreign currency exchange rate	1.515		1.515
Subsequent Event [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Floating-rate cost spread	1.25%	1.25%
Subsequent Event [Member] | Line of Credit [Member] | Matariki Forestry Group [Member]
Debt Instrument [Line Items]
Long-term debt | NZD			NZD 235
Related fees and expenses to be repaid | NZD		NZD 7
Subsequent Event [Member] | Line of Credit [Member] | Term Loan Facility [Member]
Debt Instrument [Line Items]
Debt term	9 years	9 years
Credit facility	$ 350,000,000
All-in fixed rate cost (percent)	3.30%		3.30%
Proceeds intended to borrow for capital infusion	$ 160,000,000
Number of advances provided | advance	2	2
Length of time post-closing to take advances	8 months	8 months
Subsequent Event [Member] | Line of Credit [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt term	5 years	5 years
Credit facility	$ 200,000,000
Long-term debt	$ 45,000,000
Subsequent Event [Member] | Senior Notes [Member] | Senior Exchangeable Notes due 2015 [Member]
Debt Instrument [Line Items]
Interest rate	4.50%		4.50%
Long-term debt	$ 131,000,000