Segments - Financial Information for Reportable Segments (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Segment Reporting Information [Line Items]
Revenue	$ 37,942	$ 42,627
Direct operating expenses	31,476	32,557
General and administrative expenses	4,924	5,475
Depreciation and amortization	7,989	9,135
Operating loss	(22,026)	(4,657)
Loss before income taxes	(23,044)	(6,276)
Total assets	214,454		$ 236,099
Total assets held for sale	2,013		2,664
Operating Segments | Rocky Mountain
Segment Reporting Information [Line Items]
Revenue	23,468	24,877
Direct operating expenses	19,551	19,828
General and administrative expenses	1,489	1,046
Depreciation and amortization	3,465	4,299
Operating loss	(13,220)	(296)
Loss before income taxes	(13,255)	(358)
Total assets	75,357		93,504
Total assets held for sale	1,100		1,751
Operating Segments | Northeast
Segment Reporting Information [Line Items]
Revenue	9,794	11,840
Direct operating expenses	8,371	9,715
General and administrative expenses	634	846
Depreciation and amortization	2,551	2,664
Operating loss	(1,762)	(1,502)
Loss before income taxes	(1,875)	(1,595)
Total assets	60,529		64,023
Total assets held for sale	135		135
Operating Segments | Southern
Segment Reporting Information [Line Items]
Revenue	4,680	5,910
Direct operating expenses	3,554	3,014
General and administrative expenses	270	399
Depreciation and amortization	1,969	2,160
Operating loss	(4,509)	337
Loss before income taxes	(4,563)	291
Total assets	65,752		70,841
Total assets held for sale	0		0
Corporate/ Other
Segment Reporting Information [Line Items]
Revenue	0	0
Direct operating expenses	0	0
General and administrative expenses	2,531	3,184
Depreciation and amortization	4	12
Operating loss	(2,535)	(3,196)
Loss before income taxes	(3,351)	$ (4,614)
Total assets	12,816		7,731
Total assets held for sale	$ 778		$ 778