Seismic Data Library - Summary of the net book value of the Company’s seismic data library (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Long-Lived Assets Held and Used [Line Items]
Net seismic data library	$ 195,778	$ 180,117
U.S. Offshore [Member]
Long-Lived Assets Held and Used [Line Items]
Net seismic data library	237	181
Unconvential 3D [Member] | U.S. Onshore [Member]
Long-Lived Assets Held and Used [Line Items]
Net seismic data library	119,489	94,553
Unconvential 3D [Member] | Canada [Member]
Long-Lived Assets Held and Used [Line Items]
Net seismic data library	74,046	76,335
Conventional 3D [Member] | U.S. Onshore [Member]
Long-Lived Assets Held and Used [Line Items]
Net seismic data library	1,585	8,628
Conventional 3D [Member] | Canada [Member]
Long-Lived Assets Held and Used [Line Items]
Net seismic data library	362	294
2D [Member] | Canada [Member]
Long-Lived Assets Held and Used [Line Items]
Net seismic data library	$ 59	$ 126