v3.6.0.2
Condensed Consolidating Financial Information - Guarantor Subsidiaries - Condensed Consolidating Statements of Operations (Detail) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Condensed Income Statements, Captions [Line Items]                      
Operating revenues, net $ 144,853 $ 158,093 $ 167,136 $ 164,016 $ 186,751 $ 214,733 $ 198,547 $ 204,197 $ 634,098 $ 804,228 $ 836,270
Expenses:                      
Direct expenses                 592,550 687,050 670,007
Selling, general, and administrative expenses                 44,418 46,422 43,171
Total operating expenses                 636,968 733,472 713,178
(Gain) loss on disposition of assets, net 504 85 (4,298) 359 577 (165) (66) (7) (3,350) 339 848
Impairment of assets                 407   10,508
Equity in profit (loss) of unconsolidated affiliate                 (151) 306 96
Operating (loss) income                 224 70,111 111,640
Interest expense                 30,644 29,066 29,510
Loss on debt extinguishment                     29,833
Other income, net                 (3,271) (2,211) (818)
Total expenses                 27,373 26,855 58,525
(Loss) earnings before income taxes (12,012) (7,766) 117 (7,488) 938 14,290 11,044 16,984 (27,149) 43,256 53,115
Income tax (benefit) expense                 (469) 16,332 20,427
Net (loss) earnings $ (17,058) $ (4,967) $ 4,277 $ (8,932) $ 2,438 $ 7,669 $ 6,454 $ 10,363 (26,680) 26,924 32,688
Parent Company Only (issuer) [Member]                      
Condensed Income Statements, Captions [Line Items]                      
Operating revenues, net                 339,829 476,969 504,180
Expenses:                      
Direct expenses                 347,532 426,239 411,398
Selling, general, and administrative expenses                 32,911 35,694 32,985
Total operating expenses                 380,443 461,933 444,383
(Gain) loss on disposition of assets, net                 (3,350) 339 848
Impairment of assets                 407   10,508
Equity in profit (loss) of unconsolidated affiliate                 (151) 306 96
Operating (loss) income                 (37,520) 14,391 48,345
Equity in net earnings of consolidated subsidiaries                 (22,182) (31,225) (38,740)
Interest expense                 30,585 28,946 29,510
Loss on debt extinguishment                     29,833
Other income, net                 (3,284) (2,222) (819)
Total expenses                 5,119 (4,501) 19,784
(Loss) earnings before income taxes                 (42,639) 18,892 28,561
Income tax (benefit) expense                 (15,959) (8,032) (4,127)
Net (loss) earnings                 (26,680) 26,924 32,688
Guarantor Subsidiaries [Member]                      
Condensed Income Statements, Captions [Line Items]                      
Operating revenues, net [1]                 294,269 327,259 332,090
Expenses:                      
Direct expenses [1]                 245,018 260,829 258,627
Selling, general, and administrative expenses [1]                 11,525 10,728 10,186
Total operating expenses [1]                 256,543 271,557 268,813
Operating (loss) income [1]                 37,726 55,702 63,277
Interest expense [1]                 59 120  
Other income, net [1]                 (5) (7) (17)
Total expenses [1]                 54 113 (17)
(Loss) earnings before income taxes [1]                 37,672 55,589 63,294
Income tax (benefit) expense [1]                 15,490 24,364 24,554
Net (loss) earnings [1]                 22,182 31,225 38,740
Eliminations [Member]                      
Expenses:                      
Direct expenses                   (18) (18)
Selling, general, and administrative expenses                 (18)    
Total operating expenses                 (18) (18) (18)
Operating (loss) income                 18 18 18
Equity in net earnings of consolidated subsidiaries                 22,182 31,225 38,740
Other income, net                 18 18 18
Total expenses                 22,200 31,243 38,758
(Loss) earnings before income taxes                 (22,182) (31,225) (38,740)
Net (loss) earnings                 $ (22,182) $ (31,225) $ (38,740)
[1] Foreign subsidiaries represent minor subsidiaries and are included in the guarantor subsidiaries' amounts.