Earnings Per Share - Details of Basic and Diluted Earnings Per Share (EPS) from Continuing Operations (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
Mar. 31, 2019	Mar. 31, 2018
Earnings Per Share [Abstract]
Income from continuing operations	$ 4,603	$ 2,264
Weighted average common shares outstanding used in basic EPS	44,027	43,700
Effect of dilutive SOSARs, PSAs and RSUs	252	867
Weighted average common shares outstanding and common share equivalents used in diluted EPS	44,279	44,567
Earnings per share from continuing operations
Basic	$ 0.10	$ 0.05
Diluted	$ 0.10	$ 0.05

The amount of net income (loss) from continuing operations per each share of common stock or unit outstanding during the reporting period.

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- Definition

The amount of net income (loss) derived from continuing operations during the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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+ Details