Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2015

Accounting Policies [Abstract]

Summary of Property, Plant, Equipment and Seismic Rental Equipment

Property, plant, equipment and seismic rental equipment are stated at cost. Depreciation expense is provided straight-line over the following estimated useful lives:

	Years
Machinery and equipment	3-7
Buildings	5-25
Seismic rental equipment	3-5
Leased equipment and other	3-10

A summary of property, plant, equipment and seismic rental equipment follows (in thousands):

	December 31,
	2015			2014
Buildings	$	24,181		$	25,343
Machinery and equipment	152,358			144,864
Seismic rental equipment	1,904			2,166
Furniture and fixtures	4,334			4,064
Other	31,821			16,481
Total	214,598			192,918
Less accumulated depreciation	(142,571		)	(123,078		)
Property, plant, equipment and seismic rental equipment, net	$	72,027		$	69,840

Schedule of Multi-Client Data Library

At December 31, 2015 and 2014, multi-client data library costs and accumulated amortization consisted of the following (in thousands):

	December 31,
	2015			2014
Gross costs of multi-client data creation	$	899,273		$	849,522
Less accumulated amortization	(647,435		)	(611,651		)
Less impairments to multi-client data library	(119,601		)	(119,202		)
Total	$	132,237		$	118,669