|9 Months Ended|
Sep. 30, 2015
|Segment Reporting [Abstract]|
Our business is comprised of two business lines: (1) Drilling Services and (2) Rental Tools Services. We report our Rental Tools Services business as one reportable segment (Rental Tools) and report our Drilling Services business as two reportable segments: (1) U.S. (Lower 48) Drilling and (2) International & Alaska Drilling. We eliminate inter-segment revenue and expenses.
The following table represents the results of operations by reportable segment:
(1)For the nine months ended September 30, 2015, our largest customer, Exxon Neftegas Limited (ENL), constituted approximately 27.0 percent of our total consolidated revenues and approximately 44.7 percent of our International & Alaska Drilling segment revenues. For the nine months ended September 30, 2014, our largest customer, ENL, constituted approximately 18.9 percent of our total consolidated revenues and approximately 39.9 percent of our International & Alaska Drilling segment revenues.
(2)Operating gross margin is calculated as revenues less direct operating expenses, including depreciation and amortization expense.
The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.
Reference 1: http://www.xbrl.org/2003/role/presentationRef