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Background and Significant Accounting Policies (Details 4) (USD $) | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Foreign Currency Translation |  |  |
Foreign currency loss | $ 3,000,000 | $ 8,200,000 | $ 16,500,000
Non-cash losses from foreign currency exchange rate changes on intercompany obligations | $ 4,313,000 | $ 7,406,000 | $ 14,174,000

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