Taxes (Details 4) - Other (USD $)			36 Months Ended
Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013 Sale of certain intangible assets to wholly-owned offshore subsidiary
Taxable Transactions
Asset on consolidated balance sheet as a result of taxable transactions			$ 38,400,000
Portion of asset on consolidated balance sheet as a result of taxable transactions recorded in other non-current assets	57,089,000	52,777,000	34,800,000
Cash tax impact			$ 0

The aggregate carrying amounts, as of the balance sheet date, of assets not separately disclosed in the balance sheet.

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 210.5-02.17)

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

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 17

-Article 5

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 10

-Article 7

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