v3.4.0.3
Condensed Consolidating Financial Information - Guarantor Subsidiaries - Condensed Consolidating Statements of Operations (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Condensed Income Statements, Captions [Line Items]    
Operating revenues, net $ 164,016 $ 204,197
Expenses:    
Direct expenses 152,554 169,207
Selling, general and administrative expenses 11,673 11,237
Total operating expenses 164,227 180,444
Loss (gain) on disposal of assets, net 359 (7)
Equity in loss of unconsolidated affiliate   68
Operating income (570) 23,692
Interest expense 7,533 7,170
Other income, net (615) (462)
Total expenses 6,918 6,708
(Loss) earnings before income taxes (7,488) 16,984
Income tax (benefit) expense 1,444 6,621
Net (loss) earnings (8,932) 10,363
Parent Company Only (issuer) [Member]    
Condensed Income Statements, Captions [Line Items]    
Operating revenues, net 91,869 128,658
Expenses:    
Direct expenses 92,037 106,481
Selling, general and administrative expenses 9,044 8,508
Total operating expenses 101,081 114,989
Loss (gain) on disposal of assets, net 359 (7)
Equity in loss of unconsolidated affiliate   68
Operating income (9,571) 13,608
Equity in net income of consolidated subsidiaries (5,054) (6,131)
Interest expense 7,513 7,170
Other income, net (786) (462)
Total expenses 1,673 577
(Loss) earnings before income taxes (11,244) 13,031
Income tax (benefit) expense (2,312) 2,668
Net (loss) earnings (8,932) 10,363
Guarantor Subsidiaries [Member]    
Condensed Income Statements, Captions [Line Items]    
Operating revenues, net [1] 72,147 75,539
Expenses:    
Direct expenses [1] 60,517 62,730
Selling, general and administrative expenses [1] 2,802 2,729
Total operating expenses [1] 63,319 65,459
Operating income [1] 8,828 10,080
Interest expense [1] 20  
Other income, net [1] (2) (4)
Total expenses [1] 18 (4)
(Loss) earnings before income taxes [1] 8,810 10,084
Income tax (benefit) expense [1] 3,756 3,953
Net (loss) earnings [1] 5,054 6,131
Eliminations [Member]    
Expenses:    
Direct expenses   (4)
Selling, general and administrative expenses (173)  
Total operating expenses (173) (4)
Operating income 173 4
Equity in net income of consolidated subsidiaries 5,054 6,131
Other income, net 173 4
Total expenses 5,227 6,135
(Loss) earnings before income taxes (5,054) (6,131)
Net (loss) earnings $ (5,054) $ (6,131)
[1] Foreign subsidiaries represent minor subsidiaries and are included in the guarantor subsidiaries' amounts.