Income Taxes (Details Textual) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Valuation Allowance, Deferred Tax Asset, Change in Amount $ 6,952 $ 16,240 $ 44,230
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Compensation Cost, Amount 24,357 7,699 7,143
Income Taxes Receivable 533 195  
Deferred Tax Liability Accrued And Other Liabilities 55 49  
Deferred Tax Assets Other Current Assets 2,249 305  
Indefinite Loss Carry forwards 162,396    
Taxes Payable, Total 4,907 4,725  
Deferred Tax Assets, Operating Loss Carryforwards, Domestic 60,525    
Deferred Tax Assets, Operating Loss Carryforwards, Foreign 44,383    
Unrecognized Tax Benefits, Beginning Balance 4,166 4,166  
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Tax, Total 1,112    
Operating Loss Carryforwards Expiration Period 2015 through 2031    
United States [Member]
      
Indefinite Loss Carry forwards 58,006    
State and Local Jurisdiction [Member]
      
Operating Loss Carryforwards 158,867    
Canadian [Member]
      
Indefinite Loss Carry forwards $ 104,390