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Income for Continued Dumping and Subsidy Offset Act (CDSOA) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Income For Continued Dumping And Subsidy Offset Act [Abstract]      
Income from Continued Dumping and Subsidy Offset Act Net       $ 39,349stly_IncomeFromContinuedDumpingAndSubsidyOffsetActNet