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Subsidiary Guarantors - Schedule of Condensed Consolidating Statement of Cash Flows (Detail) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Condensed Financial Statements, Captions [Line Items]    
Net cash provided by (used in) operating activities $ 40,530 $ 37,264
Cash Flows from Investing Activities:    
Acquisitions, net of cash acquired   (62)
Acquisition related additions to property, plant and equipment   (266)
Additions to property, plant and equipment (31,038) (43,014)
Payments on landfill operating lease contracts (2,956) (3,017)
Payments related to investments   (84)
Proceeds from divestiture transactions 5,335  
Proceeds from sale of property and equipment 636 559
Proceeds from property insurance settlement 546  
Proceeds from sale of equity method investment   597
Net cash used in investing activities (27,477) (45,287)
Cash Flows from Financing Activities:    
Proceeds from long-term borrowings 296,929 134,560
Principal payments on long-term debt (301,220) (126,713)
Change in restricted cash 1,319  
Payments of financing costs (8,991) (24)
Payment of redemption premium on long-term debt (121)  
Proceeds from the exercise of share based awards 161 286
Excess tax benefit on the vesting of share based awards 179 14
Distributions to noncontrolling interest holder (1,495)  
Net cash (used in) provided by financing activities (13,239) 8,123
Net cash provided by (used in) discontinued operations   263
Net increase (decrease) in cash and cash equivalents (186) 363
Cash and cash equivalents, beginning of period 2,205 2,695
Cash and cash equivalents, end of period 2,019 3,058
Parent [Member]    
Condensed Financial Statements, Captions [Line Items]    
Net cash provided by (used in) operating activities 3,736 (4,295)
Cash Flows from Investing Activities:    
Additions to property, plant and equipment (1,441) (689)
Payments related to investments   (84)
Proceeds from sale of equity method investment   597
Net cash used in investing activities (1,441) (176)
Cash Flows from Financing Activities:    
Proceeds from long-term borrowings 296,911 134,560
Principal payments on long-term debt (300,568) (126,121)
Change in restricted cash 1,319  
Payments of financing costs (8,991) (24)
Payment of redemption premium on long-term debt (121)  
Proceeds from the exercise of share based awards 161 286
Excess tax benefit on the vesting of share based awards 179 14
Intercompany borrowings 8,805 (4,139)
Net cash (used in) provided by financing activities (2,305) 4,576
Net increase (decrease) in cash and cash equivalents (10) 105
Cash and cash equivalents, beginning of period 1,596 2,312
Cash and cash equivalents, end of period 1,586 2,417
Guarantors [Member]    
Condensed Financial Statements, Captions [Line Items]    
Net cash provided by (used in) operating activities 37,423 41,623
Cash Flows from Investing Activities:    
Acquisitions, net of cash acquired   (62)
Acquisition related additions to property, plant and equipment   (266)
Additions to property, plant and equipment (29,597) (42,325)
Payments on landfill operating lease contracts (2,956) (3,017)
Payments related to investments 1,555 (310)
Proceeds from divestiture transactions 1,835  
Proceeds from sale of property and equipment 636 559
Proceeds from property insurance settlement 546  
Net cash used in investing activities (27,981) (45,421)
Cash Flows from Financing Activities:    
Proceeds from long-term borrowings 18  
Principal payments on long-term debt (652) (592)
Intercompany borrowings (8,805) 4,139
Net cash (used in) provided by financing activities (9,439) 3,547
Net cash provided by (used in) discontinued operations   263
Net increase (decrease) in cash and cash equivalents 3 12
Cash and cash equivalents, beginning of period 253 243
Cash and cash equivalents, end of period 256 255
Non-Guarantors [Member]    
Condensed Financial Statements, Captions [Line Items]    
Net cash provided by (used in) operating activities (629) (64)
Cash Flows from Investing Activities:    
Payments related to investments (1,555) 310
Proceeds from divestiture transactions 3,500  
Net cash used in investing activities 1,945 310
Cash Flows from Financing Activities:    
Distributions to noncontrolling interest holder (1,495)  
Net cash (used in) provided by financing activities (1,495)  
Net increase (decrease) in cash and cash equivalents (179) 246
Cash and cash equivalents, beginning of period 356 140
Cash and cash equivalents, end of period $ 177 $ 386