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Summary of Significant Accounting Policies Impairment of long lived assets (Details) (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2013
|
Dec. 31, 2012
|
Dec. 31, 2011
|
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| Impairment of long lived assets [Abstract] | |||
| Impairment of Long-Lived Assets Held-for-use | $ 0 | $ 0 | $ 0 |