Earnings Per Share - Computation of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Numerator:
Income from continuing operations	$ 3,036	$ 1,735	$ 10,320	$ 5,668
Income from discontinued operations		769	19,107	388
Net Income	$ 3,036	$ 2,504	$ 29,427	$ 6,056
Denominator:
Weighted-average shares outstanding	32,322	31,893	32,244	31,848
Effect of dilutive shares	93	324	64	335
Weighted-average diluted shares	32,415	32,217	32,308	32,183
Earnings (loss) per share – basic:
Continuing operations	$ 0.09	$ 0.06	$ 0.32	$ 0.18
Discontinued operations		0.02	0.59	0.01
Earnings per share - basic	0.09	0.08	0.91	0.19
Earnings (loss) per share – diluted:
Continuing operations	0.09	0.06	0.32	0.18
Discontinued operations		0.02	0.59	0.01
Earnings per share - diluted	$ 0.09	$ 0.08	$ 0.91	$ 0.19