Registration of securities issued in business combination transactions

Reportable Segments - Results of Operations by Reportable Segment (Detail)

v2.4.0.8
Reportable Segments - Results of Operations by Reportable Segment (Detail) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 12 Months Ended
Mar. 31, 2014
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Revenues:                          
Revenues $ 229,225 $ 243,321 $ 237,762 $ 225,954 $ 167,135 $ 157,171 $ 165,200 $ 178,895 $ 176,495   $ 874,172 $ 677,761 $ 686,234
Operating gross margin:                          
Total operating gross margin 28,863 48,564 [1] 48,733 [1] 50,273 [1] 20,877 [1] 16,637 [1] 34,261 [1] 46,914 [1] 53,744 [1]   168,447 [1] 151,556 [1] 157,421
General and administrative expense (8,964) [2]       (12,845) [2]           (68,025) [2] (46,257) [2] (31,567) [2]
Impairments and other charges                   (170,000) 0 0 (170,000)
Provision for reduction in carrying value of certain assets                     (2,544) 0 (1,350)
Gain (loss) on disposition of assets, net (129)       1,148           3,994 1,974 3,659
Total operating income (loss) 19,770 28,516 35,589 28,587 9,180 (8,297) 25,903 40,978 48,689   101,872 107,273 (41,837)
Interest expense (12,039)       (10,006)           (47,820) (33,542) (22,594)
Interest income 32       59           2,450 153 256
Loss on extinguishment of debt (29,673)       0           (5,218) (2,130) 0
Changes in fair value of derivative positions                     53 55 (110)
Other 895       (165)           1,450 (832) (1,127)
Income (loss) from continuing operations before income taxes (21,015)       (932)           52,787 70,977 (65,412)
Identifiable assets:                          
Total identifiable assets                     1,254,982 1,078,238  
Corporate and other assets   279,774 [3]       177,495 [3]         279,774 [3] 177,495 [3]  
Total assets 1,500,368 1,534,756       1,255,733         1,534,756 1,255,733  
Rental Tools [Member]
                          
Revenues:                          
Revenues 80,506 [4]       57,082 [4]           310,041 [5] 246,900 [5] 237,068 [5]
Operating gross margin:                          
Total operating gross margin 13,345 [6]       21,507 [6]           91,164 [7] 113,899 [7] 120,822 [7]
Identifiable assets:                          
Total identifiable assets                     350,429 194,600  
U.S. Barge Drilling [Member]
                          
Revenues:                          
Revenues 30,490 [4]       29,865 [4]           136,855 [5] 123,672 [5] 93,763 [5]
Operating gross margin:                          
Total operating gross margin 7,824 [6]       8,758 [6]           51,257 [7] 39,608 [7] 11,115 [7]
Identifiable assets:                          
Total identifiable assets                     89,884 99,409  
U.S. Drilling [Member]
                          
Revenues:                          
Revenues 19,417 [4]       11,635 [4]           66,928 [5] 1,387 [5] 0 [5]
Operating gross margin:                          
Total operating gross margin 1,641 [6]       (4,052) [6]           (4,484) [7] (15,168) [7] (3,915) [7]
Identifiable assets:                          
Total identifiable assets                     354,208 369,683  
International Drilling [Member]
                          
Revenues:                          
Revenues 85,469 [4]       64,650 [4]           333,962 [5] 291,772 [5] 318,481 [5]
Operating gross margin:                          
Total operating gross margin 5,477 [6]       (5,645) [6]           23,732 [7] 13,138 [7] 22,948 [7]
Identifiable assets:                          
Total identifiable assets                     460,461 414,546  
Technical Services [Member]
                          
Revenues:                          
Revenues 13,343 [4]       3,903 [4]           26,386 [5] 14,030 [5] 27,284 [5]
Operating gross margin:                          
Total operating gross margin 576 [6]       309 [6]           2,050 [7] 79 [7] 5,680 [7]
Construction Contract [Member]
                          
Revenues:                          
Revenues                     0 [5] 0 [5] 9,638 [5]
Operating gross margin:                          
Total operating gross margin                     $ 4,728 [7] $ 0 [7] $ 771 [7]
[1] As the Company modified its reporting segments to be consistent with recent organizational changes to improve our drilling organization, expenses related to our U.S. Barge Drilling segment were found to be incorrectly included in our general and administrative expense during the first through third quarters of the current year. These expenses have been appropriately reclassified to be included as part of the segment operating expenses, therefore our operating gross margin for each of the first three quarters will not agree to the respective 10-Q reports for the current year only.
[2] General and administration expenses for field operations are included in operating expenses.
[3] This category includes corporate assets as well as minimal assets for our Technical Services segment primarily related to office furniture and fixtures.
[4] For the three months ended March 31, 2014, our largest customer, ENL, constituted 17.1% of our total consolidated revenues and approximately 37.6% and 52.4% of our International Drilling and Technical Services segment revenues, respectively. For the three months ended March 31, 2013, our largest customer, ENL, constituted approximately 15.1% of our total consolidated revenues and approximately 38.5% of our International Drilling segment revenues.
[5] In 2013, our largest customer, Exxon Neftegas Limited (ENL), constituted approximately 15.6 percent, respectively, of our total consolidated revenues and approximately 38.3 percent of our International Drilling segment and 33.9 percent of our Technical Services segment. In 2012, our two largest customers, ENL and Schlumberger, constituted approximately 12 percent and 10 percent, respectively, of our total consolidated revenues and approximately 27 percent and 24 percent of our International Drilling segment, respectively. In 2011, our largest customer, ENL constituted approximately 16 percent of our total revenues and approximately 34 percent of our International Drilling segment.
[6] Operating gross margin is calculated as revenues less direct operating expenses, including depreciation and amortization expense.
[7] Operating income is calculated as revenues less direct operating expenses, including depreciation and amortization expense.