EARNINGS PER COMMON SHARE - Calculations of Earnings Per Common Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Net Income (Loss):
Net (loss) income	$ (10,752)	$ 24,074	$ 42,787	$ 69,371
Dividends on preferred stock	(669)	0	(2,007)	0
Net income (loss) attributable to common stockholders	$ (11,421)	$ 24,074	$ 40,780	$ 69,371
Weighted-Average Shares:
Basic weighted-average common shares outstanding	214,187	212,927	213,812	212,682
Average potential common shares	0	3,651	2,322	2,577
Diluted weighted-average number of common shares outstanding	214,187	216,578	216,134	215,259
Income (loss) per common share:
Basic	$ (0.05)	$ 0.11	$ 0.19	$ 0.33
Diluted	$ (0.05)	$ 0.11	$ 0.19	$ 0.32
Retained Earnings [Member]
Net Income (Loss):
Net (loss) income			$ 42,787	$ 69,371
Dividends on preferred stock			$ (2,007)	$ 0