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Summary of Significant Accounting Policies - Computations of Basic and Diluted Earnings (Loss) per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Earnings Per Share [Abstract]
NET INCOME (LOSS)	$ 1,470	$ 1,140	$ 3,551	$ (1,962)
Weighted average shares of common stock outstanding:
BASIC	56,482	56,018	56,427	55,897
Dilutive effect of stock options and restricted stock	210	648	473
Diluted	56,692	56,666	56,900	55,897
BASIC	$ 0.03	$ 0.02	$ 0.06	$ (0.04)
DILUTED	$ 0.03	$ 0.02	$ 0.06	$ (0.04)

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