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

9 Months Ended

Sep. 30, 2019

Supplemental Cash Flow Elements [Abstract]

Summary of Non-cash Items from Investing and Financing Activities

Supplemental disclosure of cash flow information are as follows (in thousands):

	Nine Months Ended September 30,
	2019		2018
Cash paid during the period for:
Interest	$	6,085	$	6,733
Income taxes	7,607		2,257
Non-cash items from investing and financing activities:
Purchases of computer equipment financed through capital leases	—		3,298
Investment in multi-client data library in accounts payable and accrued expenses	4,741		6,657