Condensed Consolidating Statements of Operations (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Condensed Financial Statements, Captions [Line Items]
Total revenues	$ 78,282	$ 84,513	$ 155,211	$ 155,006
Total cost and expenses	(80,535)	(83,095)	(158,007)	(156,613)
Other income (loss)	(191)		(1,073)
Interest expense	(5,707)	(5,770)	(11,497)	(11,233)
Loss before income taxes	(8,151)	(4,352)	(15,366)	(12,840)
Income tax benefit (expense)	(500)	(292)	(760)	(314)
Net income (loss)	(8,651)	(4,644)	(16,126)	(13,154)
Consolidation, Eliminations
Condensed Financial Statements, Captions [Line Items]
Total revenues	(2,368)	(3,473)	(4,732)	(6,394)
Total cost and expenses	2,368	3,473	4,732	6,394
Net loss from equity investment in subsidiaries	16,108	7,922	29,864	21,822
Loss before income taxes	16,108	7,922	29,864	21,822
Net income (loss)	16,108	7,922	29,864	21,822
Parent
Condensed Financial Statements, Captions [Line Items]
Net loss from equity investment in subsidiaries	(7,292)	(3,285)	(13,409)	(10,437)
Interest expense	(1,359)	(1,359)	(2,717)	(2,717)
Loss before income taxes	(8,651)	(4,644)	(16,126)	(13,154)
Net income (loss)	(8,651)	(4,644)	(16,126)	(13,154)
Subsidiary Issuer
Condensed Financial Statements, Captions [Line Items]
Total revenues	1,653	1,505	2,886	2,785
Total cost and expenses	(2,575)	(2,865)	(5,092)	(5,276)
Net loss from equity investment in subsidiaries	(8,816)	(4,637)	(16,455)	(11,385)
Interest expense	(2,087)	(2,087)	(4,174)	(4,174)
Loss before income taxes	(11,825)	(8,084)	(22,835)	(18,050)
Net income (loss)	(11,825)	(8,084)	(22,835)	(18,050)
Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Total revenues	66,407	73,659	130,701	134,945
Total cost and expenses	(67,877)	(70,398)	(133,648)	(133,114)
Other income (loss)	(191)		(1,073)
Interest expense	(2,066)	(2,144)	(4,220)	(3,985)
Loss before income taxes	(3,727)	1,117	(8,240)	(2,154)
Income tax benefit (expense)	(500)	(292)	(760)	(314)
Net income (loss)	(4,227)	825	(9,000)	(2,468)
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Total revenues	12,590	12,822	26,356	23,670
Total cost and expenses	(12,451)	(13,305)	(23,999)	(24,617)
Interest expense	(195)	(180)	(386)	(357)
Loss before income taxes	(56)	(663)	1,971	(1,304)
Net income (loss)	$ (56)	$ (663)	$ 1,971	$ (1,304)