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INCOME TAXES (Details) (USD $)
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Current:      
U.S. federal $ 3,947,400 $ 35,561 $ (190,869)
Foreign 5,313,874 3,343,374 250,190
State and local 264,269 698,362 374,029
Current income tax expense (benefit) 9,525,543 4,077,297 433,350
Deferred expense 359,535 2,469,953 146,550
Income tax expense 9,885,078 6,547,250 579,900
Components of income before income tax attributable to Operations      
Components of income before income tax attributable to domestic operations 6,018,971 6,085,192 (3,002,790)
Components of income before income tax attributable to foreign operations 19,537,986 11,295,273 2,360,008
Federal income tax rate (as a percent) 35.00% 34.00% 34.00%
Reconciliation of income tax expense (provision)      
Computed expected tax expense 8,944,935 5,909,358 (218,546)
Increase (decrease) in income taxes resulting from:      
Change in effective rates used for deferred taxes   (503,693)  
Nondeductible expenses and other 768,652 534,742 548,943
State and local taxes, net of federal benefit 171,491 606,843 249,503
Income tax expense 9,885,078 6,547,250 579,900
Deferred tax assets      
Foreign tax credits 473,405 2,034,130  
Net operating loss carry forwards 462,548 776,647  
Other 92,983    
Total deferred tax assets 1,028,936 2,810,777  
Deferred tax liability      
Property, equipment, and intangible asset (8,646,047) (10,068,353)  
Total (7,617,111) (7,257,576)  
Classification of net deferred tax components      
Noncurrent (liabilities) (7,617,111) (7,257,576)  
Total (7,617,111) (7,257,576)  
Net operating loss carry forwards for U.S. federal income tax purposes $ 1,400,000