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Segment Reporting - Information about Operations in Different Segments (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Segment Reporting Information [Line Items]        
Revenues [1] $ 558,543 $ 805,857 $ 1,994,202 $ 2,402,857
Operating income (loss) [2] 43,055 33,986 136,036 96,405
Capital expenditures [3] 26,719 18,133 197,393 66,118
Depreciation and amortization 24,895 24,611 66,892 75,982
Drydock amortization 2,931 4,252 9,863 13,910
Operating Segments [Member] | AEA [Member]        
Segment Reporting Information [Line Items]        
Revenues [1] 69,699 96,371 219,134 344,385
Operating income (loss) [2] (4,884) (15,753) (26,637) 6,680
Capital expenditures [3] 269 3,286 3,795 6,715
Depreciation and amortization 6,744 9,832 21,059 33,119
Drydock amortization 2,248 3,133 7,658 9,377
Operating Segments [Member] | MEA [Member]        
Segment Reporting Information [Line Items]        
Revenues [1] 334,731 318,346 922,820 892,367
Operating income (loss) [2] 48,629 38,981 129,055 75,046
Capital expenditures [3] 8,318 2,735 13,021 17,677
Depreciation and amortization 7,269 8,393 18,113 23,150
Drydock amortization 455 443 1,519 1,606
Operating Segments [Member] | ASA [Member]        
Segment Reporting Information [Line Items]        
Revenues [1] 154,113 391,140 852,248 1,166,105
Operating income (loss) [2] (575) 16,336 36,832 26,067
Capital expenditures [3] 16,603 11,648 178,178 41,141
Depreciation and amortization 8,742 4,191 21,191 11,969
Drydock amortization 228 676 686 2,927
Corporate and Other [Member]        
Segment Reporting Information [Line Items]        
Operating income (loss) [2] (115) (5,578) (3,214) (11,388)
Capital expenditures [3] 1,529 464 2,399 585
Depreciation and amortization $ 2,140 $ 2,195 $ 6,529 $ 7,744
[1] Intersegment transactions included in revenues were not significant for either of the periods presented.
[2] The operating results for the nine months ended September 30, 2016 include: (1) a $32 million impairment charge related to the Agile vessel in the AEA segment; and (2) a $12 million impairment charge for certain underutilized marine assets in the ASA segment. The ASA segment’s operating results for the nine months ended September 30, 2015 included a $4 million impairment charge for the DB 101 and $3 million of loss on disposal of this asset.
[3] Total capital expenditures represent expenditures for which cash payments were made during the period. Capital expenditures for the three and nine months ended September 30, 2016 included $2 million and $0.1 million of cash payments for liabilities outstanding at the beginning of the respective periods. Capital expenditures for the three and nine months ended September 30, 2015 included $1 million and $10 million, respectively, of cash payments for accrued capital expenditures outstanding at the beginning of the respective periods.