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Subsidiary Guarantors - Schedule of Consolidating Statement of Operations (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Condensed Financial Statements, Captions [Line Items]    
Revenues $ 125,432 $ 116,577
Operating expenses:    
Cost of operations 90,418 87,833
General and administration 18,587 16,805
Depreciation and amortization 14,453 13,748
Divestiture transactions   (4,935)
Total operating expenses 123,458 113,451
Operating income (loss) 1,974 3,126
Other expense (income):    
Interest income (104) (141)
Interest expense 10,030 10,126
(Gain) loss on debt extinguishment (48) 521
Loss on derivative instruments   151
Other income (141) (164)
Other expense, net 9,737 10,493
Loss before income taxes (7,763) (7,367)
(Benefit) provision for income taxes (149) 596
Net loss (7,614) (7,963)
Less: Net (loss) income attributable to noncontrolling interests (6) 1,308
Net loss attributable to common stockholders (7,608) (9,271)
Parent [Member]    
Operating expenses:    
Cost of operations 9 (83)
General and administration (169) (117)
Depreciation and amortization 276 223
Total operating expenses 116 23
Operating income (loss) (116) (23)
Other expense (income):    
Interest income   (47)
Interest expense 9,962 9,988
(Gain) loss on debt extinguishment (48) 521
Loss on derivative instruments   151
Earnings from consolidated entities (2,258) (1,924)
Other income (15) (37)
Other expense, net 7,641 8,652
Loss before income taxes (7,757) (8,675)
(Benefit) provision for income taxes (149) 596
Net loss (7,608) (9,271)
Net loss attributable to common stockholders (7,608) (9,271)
Guarantors [Member]    
Condensed Financial Statements, Captions [Line Items]    
Revenues 125,432 116,453
Operating expenses:    
Cost of operations 90,398 87,679
General and administration 18,755 16,938
Depreciation and amortization 14,177 13,525
Divestiture transactions   (2,085)
Total operating expenses 123,330 116,057
Operating income (loss) 2,102 396
Other expense (income):    
Interest income (104) (94)
Interest expense 68 53
Other income (126) (127)
Other expense, net (162) (168)
Loss before income taxes 2,264 564
Net loss 2,264 564
Net loss attributable to common stockholders 2,264 564
Non-Guarantors [Member]    
Condensed Financial Statements, Captions [Line Items]    
Revenues   124
Operating expenses:    
Cost of operations 11 237
General and administration 1 (16)
Divestiture transactions   (2,850)
Total operating expenses 12 (2,629)
Operating income (loss) (12) 2,753
Other expense (income):    
Interest expense   85
Other expense, net   85
Loss before income taxes (12) 2,668
Net loss (12) 2,668
Less: Net (loss) income attributable to noncontrolling interests (6) 1,308
Net loss attributable to common stockholders (6) 1,360
Elimination [Member]    
Other expense (income):    
Earnings from consolidated entities 2,258 1,924
Other expense, net 2,258 1,924
Loss before income taxes (2,258) (1,924)
Net loss (2,258) (1,924)
Net loss attributable to common stockholders $ (2,258) $ (1,924)