Year Ended December 31, | |||||||||||
2013 | 2012 | 2011 | |||||||||
Non-monetary exchanges related to resale licensing revenue | $ | 1,656 | $ | 1,554 | $ | 7,609 | |||||
Non-monetary exchanges from underwriting of new data acquisition | — | 4,122 | 2,687 | ||||||||
Other non-monetary exchanges | — | — | 98 | ||||||||
Completion of data in progress from prior non-monetary exchanges | 2,429 | 142 | — | ||||||||
Less: Non-monetary exchanges for data in progress | — | (2,442 | ) | (179 | ) | ||||||
Total non-cash additions to seismic data library | $ | 4,085 | $ | 3,376 | $ | 10,215 | |||||