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Income Taxes (Details 1) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Income Tax [Line Items]      
Current tax provision $ 1,136 $ 1,131 $ 1,451
Deferred tax provision (recovery) (5,427) 8,422 40,284
Income tax provision (recovery) (4,291) 9,553 41,735
United States And Local [Member]
     
Income Tax [Line Items]      
Current tax provision 213 802 894
Deferred tax provision (recovery) 1,027 299 7,750
Foreign [Member]
     
Income Tax [Line Items]      
Current tax provision 923 329 557
Deferred tax provision (recovery) $ (13,959) $ 5,973 $ (12,576)