Segments (Details 1) (USD $)	Sep. 30, 2011	Jun. 02, 2011 sqm	Dec. 31, 2010
Allocation of the long-lived tangible assets based on geography
US long-lived tangible assets	$ 6,871,005		$ 3,617,420
Other countries long-lived tangible assets	24,480,961		17,200,292
Total long-lived tangible assets	31,351,966		20,817,712
Acquisition By Subsidiary (Textuals) [Abstract]
Area of office property acquired		992
Purchase price of acquired property		6,600,000
Argentina [Member]
Allocation of the long-lived tangible assets based on geography
Other countries long-lived tangible assets	14,147,946		13,580,175
Brazil [Member]
Allocation of the long-lived tangible assets based on geography
Other countries long-lived tangible assets	2,637,183		3,264,625
Mexico [Member]
Allocation of the long-lived tangible assets based on geography
Other countries long-lived tangible assets	456,358		68,878
Venezuela [Member]
Allocation of the long-lived tangible assets based on geography
Other countries long-lived tangible assets	6,823,256		206,815
Other Countries [Member]
Allocation of the long-lived tangible assets based on geography
Other countries long-lived tangible assets	$ 416,218		$ 79,799