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EARNINGS PER COMMON SHARE - Calculations of Earnings Per Common Share (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Net Income (Loss):      
Net income $ 66,956 $ 93,229 $ 21,297
Dividends on preferred stock (2,676) (223) 0
Net income attributable to common stockholders $ 64,280 $ 93,006 $ 21,297
Weighted-Average Shares:      
Basic weighted-average common shares outstanding 213,963 212,818 211,457
Average potential common shares 2,155 2,976 1,514
Diluted weighted-average number of common shares outstanding 216,118 215,794 212,971
Income (loss) per common share:      
Basic $ 0.3 $ 0.44 $ 0.1
Diluted $ 0.3 $ 0.43 $ 0.1
Retained Earnings [Member]      
Net Income (Loss):      
Net income $ 66,956 $ 93,229 $ 21,297
Dividends on preferred stock $ (2,676) $ (223) $ 0