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Debt (Long Term Debt) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013		Dec. 31, 2012
Short-term debt			$ 1,160
Debt:
Long-term debt	196,662		200,236
Less: current portion	(9,210)		(18,925)
Total long-term debt, net	187,452		181,311
Letter of Credit [Member]
Debt:
Debt, Maturity	Dec - 2016
Bcs Revolver [Member]
Short-term debt			1,160
Debt:
Debt, Maturity	Feb - 2013
Senior Notes [Member]
Debt:
Long-term debt	173,315	[1]	173,916	[1]
Debt, Maturity	Oct - 2017	[1]
Long-term Debt, Weighted Average Interest Rate	9.50%	[1]
Pst Notes Payable [Member]
Short-term debt	3,069		16,161
Debt:
Long-term debt	18,078		8,155
Debt, Maturity	Nov - 2013
Debt Instrument Maturity Period Range Start	2014
Debt Instrument Maturity Period Range End	2019
Pst Notes Payable [Member] | Maximum [Member]
Debt:
Long-term Debt, Weighted Average Interest Rate	5.50%
Pst Notes Payable [Member] | Minimum [Member]
Debt:
Long-term Debt, Weighted Average Interest Rate	4.00%
Short-term debt, Weighted Average Interest Rate	2.09%
Suzhou Long Term Note [Member]
Debt:
Long-term debt	1,470		1,445
Debt, Maturity	Feb - 2014
Long-term Debt, Weighted Average Interest Rate	7.00%
Other [Member]
Debt:
Long-term debt	$ 730		$ 559
[1] Weighted average interest rate excludes the effect of the Company's interest rate swap and the accretion of debt discount.

X

- Definition

Latest period the outstanding debt instruments are required to be repaid.

+ References

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- Definition

Earliest period the outstanding debt instruments are required to be repaid.

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- Definition

Description of the maturity date of the debt instrument including whether the debt matures serially and, if so, a brief description of the serial maturities.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5



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 210.5-02.22(a)(2))

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

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- Definition

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 7



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

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-Name Accounting Standards Codification

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

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-Paragraph 1

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- Definition

Amount of long-term debt, after unamortized discount or premium, scheduled to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19,20)

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-Number 210

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- Definition

Carrying amount of long-term debt, net of unamortized discount or premium, excluding amounts to be repaid within one year or the normal operating cycle, if longer (current maturities). Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5



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

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- Definition

Weighted average interest rate of long-term debt outstanding.

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- Definition

Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19

-Subparagraph a

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Weighted average interest rate of short-term debt outstanding.

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