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EARNINGS PER SHARE EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Basic EPS
Net income available for common stock	$ 307,754	$ 312,041	$ 134,046	$ (142,132)	$ 319,976	$ 308,880	$ 311,688	$ 336,933	$ 611,709	$ 1,277,477	$ 1,150,603
Shares									431,105	413,560	411,485
Earnings per share, basic	$ 0.69	$ 0.70	$ 0.32	$ (0.34)	$ 0.77	$ 0.75	$ 0.75	$ 0.82	$ 1.42	$ 3.09	$ 2.80
Diluted EPS
Effect of dilutive securities									$ 0	$ 0	$ 0
Effect of dilutive securities, number of shares									677	1,884	2,710
Net income available for common stock and common stock equivalents									$ 611,709	$ 1,277,477	$ 1,150,603
Shares									431,782	415,444	414,195
Earnings per share, diluted	$ 0.69	$ 0.70	$ 0.32	$ (0.34)	$ 0.77	$ 0.74	$ 0.75	$ 0.81	$ 1.42	$ 3.07	$ 2.78

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Amount of increase (decrease) to net income used for calculating diluted earnings per share (EPS), resulting from the assumed exercise stock options, restrictive stock units (RSUs), convertible preferred stock of an employee stock ownership plan (ESOP), and other dilutive convertible securities.

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

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