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Common Stock and Earnings Per Share - Details of Earnings Per Share Calculations (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Net income from continuing operations $ 2,199 $ 13,657
Loss from discontinued operations 0 (23)
Net income $ 2,199 $ 13,634
Weighted average common shares outstanding:    
Basic 39,681 39,527
Incremental shares with dilutive effect:    
Diluted 39,755 39,660
Basic income (loss) per share    
Continuing $ 0.06 $ 0.34
Discontinued 0.00 0.00
Total 0.06 0.34
Diluted income (loss) per share    
Continuing 0.06 0.34
Discontinued 0.00 0.00
Total $ 0.06 $ 0.34
Restricted Stock [Member]    
Incremental shares with dilutive effect:    
Restricted stock awards 74 133