Consolidated Supplemental Schedule of Quarterly Financial Information - Schedule of Quarterly Financial Information (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Quarterly Financial Information Disclosure [Abstract]
Revenue	$ 47,353	$ 49,373	$ 49,625	$ 47,038	$ 50,439	$ 49,626	$ 48,195	$ 45,683	$ 193,389	$ 193,943	$ 192,315
Income (loss) from continuing operations after depreciation and amortization	(3,563)	2,187	(97)	365	1,273	1,969	991	(88)	(1,108)	4,145	5,348
Net income (loss) from continuing operations	(2,894)	1,398	(709)	(821)	(172)	737	28	(812)	(3,026)	(219)	(1,318)
Income (loss) from discontinued operations	1,672	(74,092)	(16,264)	68,493	(15,724)	(10,837)	(4,191)	(5,004)	(20,191)	(35,756)	(12,695)
Net income (loss)	$ (1,222)	$ (72,694)	$ (16,973)	$ 67,672	$ (15,896)	$ (10,100)	$ (4,163)	$ (5,816)	$ (23,217)	$ (35,975)	$ (14,013)
Income (loss) per share:
Basic and Diluted - continuing operations	$ (0.18)	$ 0.09	$ (0.04)	$ (0.05)	$ (0.01)	$ 0.04	$ 0.00	$ (0.05)	$ (0.18)	$ (0.01)	$ (0.08)