Income Taxes Reconciliation of deferred taxes (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Valuation Allowance [Line Items]
Property, plant and equipment	$ 172.1	$ 178.9
Deferred Tax Liabilities	(93.8)us-gaap_DeferredTaxLiabilities	(137.8)us-gaap_DeferredTaxLiabilities
Inventory	(8.1)us-gaap_DeferredTaxAssetsInventory	(8.1)us-gaap_DeferredTaxAssetsInventory
Accrued liabilities	(84.9)	(70.0)
Deferred Tax Assets, Operating Loss Carryforwards	(134.0)	(97.1)
Benefit of federal & state tax credit carryovers	(17.8)	(14.9)
Deferred Tax Assets, Other	(3.9)us-gaap_DeferredTaxAssetsOther	(6.0)us-gaap_DeferredTaxAssetsOther
Valuation Allowance, Amount	32.3	23.5
Deferred Tax Assets, Net, Current	(45.1)us-gaap_DeferredTaxAssetsNetCurrent	(50.9)us-gaap_DeferredTaxAssetsNetCurrent
Long-term deferred tax asset	(0.6)us-gaap_DeferredTaxAssetsNetNoncurrent	0us-gaap_DeferredTaxAssetsNetNoncurrent
Long-term deferred tax liability	139.5	188.7
Timber Properties
Valuation Allowance [Line Items]
Deferred Tax Liabilities	(17.8)	(10.5)
Installment sales gain deferral
Valuation Allowance [Line Items]
Deferred Tax Liabilities	(129.2)	(129.9)
Undistributed Income from Other than Gain (Loss) on Sale of Properties
Valuation Allowance [Line Items]
Deferred Tax Liabilities	$ (8.9)	$ (8.9)

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from inventory.

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Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards expected to be realized or consumed within one year or operating cycle, if longer.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible state and local operating loss carryforwards.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences not separately disclosed.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from accrued liabilities.

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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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Amount of deferred tax liability attributable to taxable temporary differences net of deferred tax asset attributable to deductible temporary differences and carryforwards after valuation allowances.

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Amount of deferred tax liability attributable to taxable temporary differences, net of deferred tax asset attributable to deductible temporary differences and carryforwards net of valuation allowances expected to be realized or consumed after one year (or the normal operating cycle, if longer).

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Amount of deferred tax liability attributable to taxable temporary differences from property, plant, and equipment.

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