Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
CURRENT ASSETS
Cash and cash equivalents	$ 266,017	$ 280,596
Accounts receivable, less allowance for doubtful accounts of $503 and $417	105,693	100,359
Inventory
Finished goods	95,614	103,568
Work in progress	2,404	4,446
Raw materials	13,482	17,602
Manufacturing and maintenance supplies	2,143	2,350
Total inventory	113,643	127,966
Deferred tax assets	66,509	15,845
Prepaid and other current assets	38,896	41,508
Total current assets	590,758	566,274
TIMBER AND TIMBERLANDS, NET OF DEPLETION AND AMORTIZATION	1,565,782	1,573,309
PROPERTY, PLANT AND EQUIPMENT
Land	21,804	27,383
Buildings	134,337	147,445
Machinery and equipment	1,389,212	1,444,012
Construction in progress	327,353	268,459
Total property, plant and equipment, gross	1,872,706	1,887,299
Less—accumulated depreciation	(1,112,468)	(1,180,261)
Total property, plant and equipment, net	760,238	707,038
INVESTMENT IN JOINT VENTURE (Note 6)	73,830	72,419
OTHER ASSETS	211,677	203,911
TOTAL ASSETS	3,202,285	3,122,951
CURRENT LIABILITIES
Accounts payable	108,493	70,381
Current maturities of long-term debt	50,000	150,000
Accrued taxes	30,059	13,824
Accrued payroll and benefits	18,471	28,068
Accrued interest	11,200	7,956
Accrued customer incentives	8,936	10,849
Other current liabilities	25,168	18,640
Current liabilities for dispositions and discontinued operations (Note 11)	8,398	8,105
Total current liabilities	260,725	307,823
LONG-TERM DEBT	1,150,471	1,120,052
NON-CURRENT LIABILITIES FOR DISPOSITIONS AND DISCONTINUED OPERATIONS (Note 11)	71,799	73,590
PENSION AND OTHER POSTRETIREMENT BENEFITS (Note 13)	158,829	159,582
OTHER NON-CURRENT LIABILITIES	21,271	23,900
COMMITMENTS AND CONTINGENCIES (Note 10 and 12)
SHAREHOLDERS’ EQUITY
Common Shares, 480,000,000 shares authorized, 125,903,058 and 123,332,444 shares issued and outstanding	673,098	670,749
Retained earnings	968,973	876,634
Accumulated other comprehensive loss	(102,881)	(109,379)
TOTAL SHAREHOLDERS' EQUITY	1,539,190	1,438,004
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 3,202,285	$ 3,122,951