Goodwill (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Goodwill [Line Items]
GOODWILL	$ 164,464	$ 163,337	$ 163,337
Goodwill, Acquired During Period	1,127	0
Reservoir Description Segment [Member]
Goodwill [Line Items]
GOODWILL	82,059	80,932	80,932
Goodwill, Acquired During Period	1,127	0
Production Enhancement Segment [Member]
Goodwill [Line Items]
GOODWILL	79,560	79,560	79,560
Goodwill, Acquired During Period	0	0
Reservoir Management Segment [Member]
Goodwill [Line Items]
GOODWILL	2,845	2,845	2,845
Goodwill, Acquired During Period	$ 0	$ 0