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Segment Reporting - Segment Results Information (Detail) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Segment Reporting Information [Line Items]        
REVENUES $ 452,254 $ 430,707 $ 958,748 $ 881,744
Voyage expenses 33,439 26,154 68,451 52,469
Vessel operating expenses 201,714 195,978 402,900 383,442
Time-charter hire expense 9,714 26,544 26,006 53,996
Depreciation and amortization 103,373 109,769 206,831 212,263
General and administrative 36,945 35,395 74,823 74,666
Loan loss provisions (recoveries) (2,521) 7,042 (2,521) 10,207
(Gain) loss on sale of vessels and equipment (9,615) (1,341) (9,453) (1,309)
Restructuring charges (244) 1,789 395 3,843
Income from vessel operations 79,449 29,377 191,316 92,167
Shuttle Tanker and FSO Segment [Member]
        
Segment Reporting Information [Line Items]        
REVENUES 142,816 140,062 304,028 278,715
Voyage expenses 24,890 22,275 56,619 44,084
Vessel operating expenses 46,989 43,472 93,007 88,379
Time-charter hire expense 4,975 14,110 16,387 28,887
Depreciation and amortization 27,039 29,093 54,376 56,789
General and administrative 8,005 9,324 17,382 19,828
Restructuring charges (820) 1,043 (268) 1,630
Income from vessel operations 31,738 20,745 66,525 39,118
FPSO Segment [Member]
        
Segment Reporting Information [Line Items]        
REVENUES 131,155 122,560 273,674 263,489
Voyage expenses 172   172  
Vessel operating expenses 92,436 84,054 185,940 161,438
Depreciation and amortization 38,056 39,285 75,868 73,317
General and administrative 15,524 11,760 30,865 24,121
Loan loss provisions (recoveries) (2,521)   (2,521)  
(Gain) loss on sale of vessels and equipment   (1,338)   (1,338)
Income from vessel operations (12,512) (11,201) (16,650) 5,951
Liquefied Gas Segment [Member]
        
Segment Reporting Information [Line Items]        
REVENUES 81,970 70,983 163,393 141,984
Voyage expenses 739 487 1,572 491
Vessel operating expenses 17,139 15,164 33,650 30,260
Depreciation and amortization 17,888 18,328 36,001 35,619
General and administrative 6,294 5,314 13,494 11,510
Income from vessel operations 39,910 31,690 78,676 64,104
Conventional Tanker [Member]
        
Segment Reporting Information [Line Items]        
REVENUES 96,313 97,102 217,653 197,556
Voyage expenses 7,638 3,392 10,088 7,894
Vessel operating expenses 45,150 53,288 90,303 103,365
Time-charter hire expense 4,739 12,434 9,619 25,109
Depreciation and amortization 20,390 23,063 40,586 46,538
General and administrative 7,122 8,997 13,082 19,207
Loan loss provisions (recoveries)   7,042   10,207
(Gain) loss on sale of vessels and equipment (9,615) (3) (9,453) 29
Restructuring charges 576 746 663 2,213
Income from vessel operations $ 20,313 $ (11,857) $ 62,765 $ (17,006)