Supplemental Cash Flow Information and Non-Cash Activity (Tables)

9 Months Ended

Sep. 30, 2015

Supplemental Cash Flow Elements [Abstract]

Summary of Non-cash Items from Investing and Financing Activities

The following table is a summary of cash paid for Interest and Income taxes and non-cash items from investing and financing activities (in thousands):

	Nine Months Ended September 30,
	2015			2014
Cash paid during the period for:
Interest	$	8,036		$	9,087
Income taxes	$	7,614		$	12,008
Non-cash items from investing and financing activities:
Purchases of computer equipment financed through capital leases	$	1,178		$	5,768
Investment in multi-client data library financed through accounts payable	$	13,617		$	1,298
Conversion of investment in a convertible note to equity	$	—		$	3,151
Transfer of inventory to property, plant, equipment and seismic rental equipment	$	15,936	(a)	$	3,039

^(a)  This transfer of inventory to property, plant, equipment and seismic rental equipment relates to ocean bottom seismic equipment manufactured by the Company to be deployed in the acquisition of ocean bottom seismic data. During the nine months ended September 30, 2015, the Company purchased approximately $17.6 million of property, plant, equipment and seismic rental equipment, including approximately $14.3 million related to the manufacture of ocean bottom seismic equipment that will be used by the Ocean Bottom Services segment.