Discontinued Operations - Summary of Activity for Discontinued Operations (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Discontinued Operations And Disposal Groups [Abstract]
Revenue from discontinued operations		$ 800	$ 23	$ 1,741
Operating loss before income taxes	(16)	(44)	(126)	(129)
Income tax benefit from discontinued operations	6	16	52	48
Gain on disposal, before income taxes	119	166	107	124
Income tax expense on disposal	(48)	(62)	(44)	(46)
Income/Loss from discontinued operations	$ 61	$ 76	$ (11)	$ (3)