Significant Accounting Policies - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014 Facility	Dec. 31, 2013	Dec. 31, 2012
Significant Accounting Policies [Line Items]
Number of production plants	7crr_NumberOfProductionPlants
Allowance for doubtful accounts	$ 1,842	$ 2,083
Other receivables	1,084us-gaap_OtherReceivablesGrossCurrent	2,781us-gaap_OtherReceivablesGrossCurrent
Lower of cost or market inventory adjustment	5,363us-gaap_InventoryWriteDown
Loss (gain) on disposal or impairment of assets	(15,079)	43	(518)
Impairment of long-lived assets	15,120
Difference between fair value and carrying value less cost to sell	2,138
Start-up costs	811crr_StartUpCosts	0crr_StartUpCosts	68crr_StartUpCosts
Research and development expenses	$ 10,855us-gaap_ResearchAndDevelopmentExpense	$ 8,416us-gaap_ResearchAndDevelopmentExpense	$ 6,916us-gaap_ResearchAndDevelopmentExpense
Georgia and Alabama
Significant Accounting Policies [Line Items]
Area of land and leasehold interests	4,235
Marshfield, Wisconsin
Significant Accounting Policies [Line Items]
Area of land and leasehold interests	490
Maximum
Significant Accounting Policies [Line Items]
Receivables collection period	30 days
Maturity period for all highly liquid investments when purchased to be cash equivalents	3 months
Capitalized software estimated useful life	5 years

Capitalized Software, Estimated Useful Life

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- Definition

Cash Equivalents, Maturity Period

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- Definition

Number of Acres of Land and Leasehold Interests

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- Definition

Number of Production Plants

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- Definition

Receivable, Collection Period

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- Definition

Start Up Costs

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- Definition

A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 4

-Article 5

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

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-Topic 210

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- Definition

Amount of gain (loss) from the difference between the sale price or salvage price and the book value of an asset that was sold or retired, and gain (loss) from the write down of assets from their carrying value to fair value.

+ References

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- Definition

The aggregate amount of write-downs for impairments recognized during the period for long-lived assets held for abandonment, exchange or sale.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

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-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 45

-Paragraph 15

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- Definition

Charge to cost of goods sold that represents the reduction of the carrying amount of inventory, generally attributable to obsolescence or market conditions.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

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-Name Accounting Standards Codification

-Topic 330

-SubTopic 10

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-Paragraph 2

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- Definition

Amounts of other receivables due within one year of the balance sheet date (or one operating cycle, if longer) from third parties or arising from transactions not separately disclosed.

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- Definition

Amount of fair value of reporting unit in excess of carrying amount.

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- Definition

The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 985

-SubTopic 20

-Section 50

-Paragraph 1

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-Name Accounting Standards Codification

-Topic 730

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