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- Definition

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+ References

No definition available.

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- Definition

Purchase Obligation Percentage

+ References

No definition available.

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- Definition

Renewal Option Terms Maximum Additional Period

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No definition available.

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- Definition

Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

+ References

No definition available.

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- Definition

The minimum amount the entity agreed to spend under the long-term purchase commitment.

+ References

No definition available.

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- Definition

Number of units of goods that must be purchased within the specified time period of the agreement to avoid penalties or unfavorable effects on pricing, among other adverse consequences.

+ References

No definition available.

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- Definition

Period covered by the long-term purchase commitment, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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- Definition

Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.13)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 13

-Subparagraph a

-Article 5

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 8

-Article 7

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Commitments - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended			1 Months Ended	12 Months Ended	0 Months Ended	1 Months Ended	0 Months Ended	1 Months Ended	0 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	May 31, 2012	Dec. 31, 2011	Nov. 01, 2008	Jan. 31, 2003	Jan. 30, 2012	Jul. 31, 2011	Nov. 30, 2012
Long-term Purchase Commitment [Line Items]
Annual rental fee	$ 24,116us-gaap_LeaseAndRentalExpense	$ 22,542us-gaap_LeaseAndRentalExpense	$ 21,452us-gaap_LeaseAndRentalExpense
Net book value of property leased	568,716us-gaap_PropertyPlantAndEquipmentNet	478,535us-gaap_PropertyPlantAndEquipmentNet
Lease Agreements
Long-term Purchase Commitment [Line Items]
Net book value of property leased	367,053
During 2015 \| Natural Gas Purchase Contract
Long-term Purchase Commitment [Line Items]
Purchase commitment amount	25,119
During 2016 \| Natural Gas Purchase Contract
Long-term Purchase Commitment [Line Items]
Purchase commitment amount	20,142
During 2017 \| Natural Gas Purchase Contract
Long-term Purchase Commitment [Line Items]
Purchase commitment amount	13,473
During 2018 \| Natural Gas Purchase Contract
Long-term Purchase Commitment [Line Items]
Purchase commitment amount	9,923
Eufaula \| kaolin \| Supplier 2
Long-term Purchase Commitment [Line Items]
Commitment effective date				May 2012	2011-01-01
Purchase commitment, period					3 years
Additional purchase commitment, period					6 years
Purchase commitment amount	2,263	3,788	3,012
Eufaula \| kaolin \| Supplier 2 \| After Amendment
Long-term Purchase Commitment [Line Items]
Additional purchase commitment, period				3 years
Eufaula \| kaolin \| Supplier 2 \| Minimum
Long-term Purchase Commitment [Line Items]
Purchase obligation percentage of annual requirements					70.00%
Eufaula \| kaolin \| Supplier 2 \| Minimum \| After Amendment
Long-term Purchase Commitment [Line Items]
Purchase commitment, period				5 years
Purchase obligation percentage of annual requirements				50.00%
McIntyre \| Wilkinson County Development Authority
Long-term Purchase Commitment [Line Items]
Agreement entry date						Nov. 01, 2008
Annual rental fee						50
Lease agreement period						Through the year 2022
McIntyre \| kaolin \| Supplier 3
Long-term Purchase Commitment [Line Items]
Commitment effective date							2003-01-01
Purchase commitment amount	14,823	13,091	12,919
Agreement entry date							Jan. 01, 2003
McIntyre \| kaolin \| Supplier 3 \| Minimum
Long-term Purchase Commitment [Line Items]
Purchase obligation percentage of annual requirements							80.00%
Marshfield, Wisconsin
Long-term Purchase Commitment [Line Items]
Purchase commitment amount	6,922	3,546	2,538
Marshfield, Wisconsin \| After Amendment
Long-term Purchase Commitment [Line Items]
Purchase commitment, commencing date								2012-01-30
Marshfield, Wisconsin \| Prior Agreement
Long-term Purchase Commitment [Line Items]
Commitment effective date									2011-07-30
Purchase commitment, period									5 years
Marshfield, Wisconsin \| During 2011 \| Prior Agreement
Long-term Purchase Commitment [Line Items]
Minimum quantity to be purchased annually									40,000
Marshfield, Wisconsin \| During 2012 \| After Amendment
Long-term Purchase Commitment [Line Items]
Minimum quantity to be purchased annually								150,000
Marshfield, Wisconsin \| During 2012 \| Prior Agreement
Long-term Purchase Commitment [Line Items]
Minimum quantity to be purchased annually									100,000
Marshfield, Wisconsin \| During 2013 \| After Amendment
Long-term Purchase Commitment [Line Items]
Minimum quantity to be purchased annually								150,000
Marshfield, Wisconsin \| During 2014 \| After Amendment
Long-term Purchase Commitment [Line Items]
Minimum quantity to be purchased annually								350,000
Millen Georgia \| Jenkins County Development Authority
Long-term Purchase Commitment [Line Items]
Agreement entry date										Nov. 01, 2012
Lease agreement period										Until the tenth anniversary of completion of the final phase of the facility.
Lease administrative fees										50
Millen Georgia \| Kaolin And Bauxite \| Supplier 7
Long-term Purchase Commitment [Line Items]
Purchase commitment, period				5 years
Additional purchase commitment, period				5 years
Purchase commitment amount	$ 1,465
Agreement entry date				May 31, 2012
Millen Georgia \| Kaolin And Bauxite \| Supplier 7 \| Minimum
Long-term Purchase Commitment [Line Items]
Purchase obligation percentage of annual requirements				50.00%