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

6 Months Ended

Jun. 30, 2016

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):

	Six Months Ended June 30,
	2016				2015
Cash paid during the period for:
Interest	$	8,149			$	7,843
Income taxes (refunds)	(6		)		9,649
Non-cash items from investing and financing activities:
Purchases of computer equipment financed through capital leases	—				1,178
Investment in multi-client data library financed through accounts payable	—				6,706
Bond exchange	10,740			(a)	—
Transfer of inventory to property, plant, equipment and seismic rental equipment	—				15,936		(b)

^(a)  This represents the non cash portion of the bond exchange.

^(b)  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.