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Subsequent Events	12 Months Ended
Subsequent Events	Dec. 31, 2012
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events In February 2013, the Company purchased a 30% interest in the joint venture, GeoRXT B.V. (“GeoRXT”), from RXT for $1.5 million. GeoRXT is headquartered in Rio de Janeiro, Brazil, and specializes in seismic acquisition using ocean bottom cables. Additionally, the Company provided an $8.0 million loan to GeoRXT, which includes a guaranty by GeoRXT’s parent. GeoRXT is obligated to repay this loan to the Company on or before May 10, 2013.