Registration of securities issued in business combination transactions

Selected Quarterly Financial Data - Schedule of Selected Quarterly Financial Data (Detail)

v2.4.0.8
Selected Quarterly Financial Data - Schedule of Selected Quarterly Financial Data (Detail) (USD $)
In Thousands, except Per Share data, 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, 2013
Dec. 31, 2012
Dec. 31, 2011
Quarterly Financial Information Disclosure [Abstract]                        
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 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
Operating income 19,770 28,516 35,589 28,587 9,180 (8,297) 25,903 40,978 48,689 101,872 107,273 (41,837)
Net income (loss) attributable to controlling interest $ (12,549) $ 10,172 $ 7,970 $ 8,281 $ 592 $ (20,098) $ 10,936 $ 20,083 $ 26,392 $ 27,015 $ 37,313 $ (50,451)
Basic earnings per share - net income (loss) $ (0.10) $ 0.08 [2] $ 0.07 [2] $ 0.07 [2] $ 0.00 [2] $ (0.17) [2] $ 0.09 [2] $ 0.17 [2] $ 0.23 [2] $ 0.23 [2] $ 0.32 [2] $ (0.43)
Diluted earnings per share - net income (loss) $ (0.10) $ 0.08 [2] $ 0.07 [2] $ 0.07 [2] $ 0.00 [2] $ (0.17) [2] $ 0.09 [2] $ 0.17 [2] $ 0.22 [2] $ 0.22 [2] $ 0.31 [2] $ (0.43)
[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] As a result of shares issued during the year, earnings per share for each of the year's four quarters, which are based on weighted average shares outstanding during each quarter, may not equal the annual earnings per share, which is based on the weighted average shares outstanding during the year. Additionally, as a result of rounding to the thousands, revenues, operating gross margin, operating income, and net income (loss) attributable to controlling interest may not equal the 2013 year to date results.