Annual report pursuant to Section 13 and 15(d)

Income Taxes (Narrative) (Details)

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Income Taxes (Narrative) (Details) (USD $)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Income Tax Disclosure [Abstract]      
Net operating loss carryforwards $ 56,749,000 $ 58,272,000  
Net operating loss carryforwards, expiration year 2015    
Deferred tax assets, net operating loss carryforwards 6,198,000 6,364,000  
Valuation allowance of operating loss carryforwards, percentage 100.00% 100.00%  
Non-current deferred tax assets 6,293,000 11,605,000  
Undistributed earnings of foreign subsidiaries 284,611,000    
Unrecognized deferred tax liability associated with undistributed earnings 70,218,000    
Unrecognized tax benefits that would affect the effective tax rate 10,328,000 12,735,000  
Estimated change in unrecognized tax benefits, minimum range 0    
Estimated change in unrecognized tax benefits, maximum range 10,136,000    
Interest expense and penalties recognized (reversed) (357,000) (501,000) 780,000
Accrued interest and penalties related to uncertain tax positions $ 3,077,000 $ 3,434,000