EARNINGS PER COMMON SHARE - Calculations of Earnings Per Common Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Net Income (Loss):
Net income	$ 27,998	$ 21,953	$ 53,539	$ 45,297
Dividends on preferred stock	(669)	0	(1,338)	0
Net income (loss) attributable to common stockholders	$ 27,329	$ 21,953	$ 52,201	$ 45,297
Weighted-Average Shares:
Basic weighted-average common shares outstanding	213,900	212,768	213,621	212,558
Average potential common shares	2,932	3,155	3,482	2,040
Diluted weighted-average number of common shares outstanding	216,832	215,923	217,103	214,598
Income (loss) per common share:
Basic	$ 0.13	$ 0.1	$ 0.24	$ 0.21
Diluted	$ 0.13	$ 0.1	$ 0.24	$ 0.21
Retained Earnings [Member]
Net Income (Loss):
Net income			$ 53,539	$ 45,297
Dividends on preferred stock			$ (1,338)	$ 0