Goodwill, Trademarks and Intangible Assets - Other Intangible Assets (Details) (USD $)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]
Amortized intangible assets	$ 165,123,000	$ 165,123,000
Accumulated amortization	(87,578,000)	(78,210,000)
Other intangible assets, net	77,545,000us-gaap_FiniteLivedIntangibleAssetsNet	86,913,000us-gaap_FiniteLivedIntangibleAssetsNet
Amortization expense of other intangible assets	9,368,000us-gaap_AmortizationOfIntangibleAssets	9,366,000us-gaap_AmortizationOfIntangibleAssets	9,418,000us-gaap_AmortizationOfIntangibleAssets
Estimated amortization expense, next twelve months	9,000,000
Estimated amortization expense, year two	9,000,000
Estimated amortization expense, year three	9,000,000
Estimated amortization expense, year four	9,000,000
Estimated amortization expense, year five	9,000,000
Useful lives of other intangible assets	5 years
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Amortized intangible assets	110,000,000	110,000,000
Accumulated amortization	(56,755,000)	(50,647,000)
Patented technology
Finite-Lived Intangible Assets [Line Items]
Amortized intangible assets	55,123,000	55,123,000
Accumulated amortization	$ (30,823,000)	$ (27,563,000)

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(2)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

+ Details

Name:	us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References