| Related Party Transactions Related Party Transactions (Details) | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 60 Months Ended | ||||
|---|---|---|---|---|---|---|---|---|---|
| Jun. 30, 2014
 USD ($) | Jun. 30, 2013
 USD ($) | Jun. 30, 2014
 USD ($) | Jun. 30, 2013
 USD ($) | Dec. 31, 2013
 USD ($) | Jun. 30, 2014
 Swire Resources [Member]
 USD ($) | Jun. 30, 2014
 Swire Resources [Member]
 USD ($) | Jun. 30, 2014
 China, Yuan Renminbi
 Swire Resources [Member]
 CNY | Dec. 31, 2018
 Scenario, Forecast [Member]
 Swire Resources [Member] | |
| Related Party Transaction [Line Items] | |||||||||
| Related party service fees | $ 2,173,000 | $ 4,880,000 | |||||||
| Related party sourcing fees | 8,000 | 293,000 | |||||||
| Note payable to related party noncurrent | 15,734,000 | 0 | 15,734,000 | 0 | 0 | 97,600,000 | |||
| Related party note payable maturity date | Dec. 31, 2018 | ||||||||
| Related party note payable interest rate | 7.00% | 7.00% | |||||||
| Related party interest expense on note payable | 277,000 | 0 | 487,000 | 0 | 277,000 | 487,000 | |||
| Accounts payable to related party current | $ 5,044,000 | $ 5,044,000 | |||||||
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- Definition Amount for accounts payable to related parties. 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 
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- Definition Costs of sales and operating expenses for the period incurred from transactions with related parties. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Amount of interest expense incurred on a debt or other obligation to related party. No definition available. 
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- Definition The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a set, unchanging rate. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition The amount for notes payable (written promise to pay), payable to related parties, which are due after one year (or one business cycle). Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Date of maturity or expiration of arrangements with a related party (for example, but not limited to, leasing and debt arrangements between related parties), in CCYY-MM-DD format. No definition available. 
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- Definition Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Details 
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