Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets, Net (Narrative) (Details)

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Intangible Assets, Net (Narrative) (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]  
Estimated useful life 10 years
Estimated annual amortization expense for intangible assets subject to amortization, 2013 $ 1,330
Estimated annual amortization expense for intangible assets subject to amortization, 2014 1,330
Estimated annual amortization expense for intangible assets subject to amortization, 2015 1,330
Estimated annual amortization expense for intangible assets subject to amortization, 2016 1,330
Estimated annual amortization expense for intangible assets subject to amortization, 2017 $ 1,330