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Notes Receivable (Details) - (Table)
In Thousands, unless otherwise specified
Jun. 30, 2014
USD ($)
Dec. 31, 2013
USD ($)
Jun. 30, 2013
USD ($)
Dec. 31, 2013
Note receivable – Seller of SM Canada [Member]
USD ($)
Mar. 31, 2012
Note receivable – Seller of SM Canada [Member]
USD ($)
Mar. 31, 2012
Note receivable – Seller of SM Canada [Member]
CAD
Notes receivable $ 2,552 $ 3,171 $ 3,085      
Due from       $ 3,171 $ 3,085 3,107