Accrued Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Accrued Liabilities [Abstract]
Salaries and wages	$ 19,229us-gaap_AccruedSalariesCurrent	$ 18,177us-gaap_AccruedSalariesCurrent
Accrual for compensated absences	11,330us-gaap_CompensatedAbsencesLiability	12,886us-gaap_CompensatedAbsencesLiability
Employee benefits	11,525us-gaap_AccruedEmployeeBenefitsCurrent	9,960us-gaap_AccruedEmployeeBenefitsCurrent
Pension liability - current portion	2,141	2,321
Postretirement medical benefits - current portion	4,750	5,056
Returns and allowances	17,265us-gaap_CustomerRefundLiabilityCurrent	22,428us-gaap_CustomerRefundLiabilityCurrent
Interest	2,052us-gaap_InterestPayableCurrent	2,131us-gaap_InterestPayableCurrent
Restructuring costs	1,873us-gaap_RestructuringReserveCurrent	9,656us-gaap_RestructuringReserveCurrent
Dividends	5,098us-gaap_DividendsPayableCurrent	4,765us-gaap_DividendsPayableCurrent
Workers' compensation	2,502	2,582
Billings in excess of revenue recognized	2,024us-gaap_BillingsInExcessOfCostCurrent	7,081us-gaap_BillingsInExcessOfCostCurrent
Professional fees	2,051us-gaap_AccruedProfessionalFeesCurrent	2,486us-gaap_AccruedProfessionalFeesCurrent
Utilities	962us-gaap_AccruedUtilitiesCurrent	1,175us-gaap_AccruedUtilitiesCurrent
Other	12,347us-gaap_OtherAccruedLiabilitiesCurrent	11,627us-gaap_OtherAccruedLiabilitiesCurrent
Total	$ 95,149us-gaap_AccruedLiabilitiesCurrent	$ 112,331us-gaap_AccruedLiabilitiesCurrent

Carrying value as of the balance sheet date of obligations, excluding pension and other postretirement benefits, incurred through that date and payable for perquisites provided to employees pertaining to services received from them. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 20

-Article 5

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Current Liabilities

-URI http://asc.fasb.org/extlink&oid=6509677

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section 45

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6935-107765

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.20)

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

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section 45

-Paragraph 6

-URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6911-107765