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SHAREHOLDERS' EQUITY (Tables)

12 Months Ended

Dec. 31, 2019

Stockholders' Equity Note [Abstract]

COMMON SHARES ISSUED AND OUTSTANDING

The following table presents changes in common shares issued and outstanding:

	Year ended December 31,	2019			2018			2017
	Shares issued, balance at beginning of year	176,580			176,580			176,580
	Shares issued	—			—			—
	Total shares issued at end of year	176,580			176,580			176,580
	Treasury shares, balance at beginning of year	(92,994	)		(93,419	)		(90,139	)
	Shares repurchased	(176	)		(200	)		(4,288	)
	Shares reissued	549			625			1,008
	Total treasury shares at end of year	(92,621	)		(92,994	)		(93,419	)
	Total shares outstanding	83,959			83,586			83,161

SHARE REPURCHASES

The following table presents common shares repurchased from shares held in Treasury:

	Year ended December 31,	2019				2018				2017
	In the open market:
	Total shares	—				—				3,932
	Total cost	$	—			$	—			$	261,180
	Average price per share(1)	$	—			$	—			$	66.43
	From employees:(2)
	Total shares	176				200				356
	Total cost	$	10,165			$	10,080			$	24,678
	Average price per share(1)	$	57.66			$	50.40			$	69.36
	Total shares repurchased:
	Total shares	176				200				4,288
	Total cost	$	10,165			$	10,080			$	285,858
	Average price per share(1)	$	57.66			$	50.40			$	66.67

(1) Calculated using whole numbers.

(2) Shares are repurchased from employees to satisfy withholding tax liabilities that arise on the vesting of share-settled restricted stock units.

SUMMARY OF DIVIDENDS DECLARED AND PAID

The following table presents dividends declared and paid related to the Company's common and preferred shares:

		Per share data
		Dividends declared				Dividends paid in year of declaration				Dividends paid in year following declaration
	Year ended December 31, 2017
	Common shares	$	1.53			$	1.14			$	0.39
	Series C preferred shares	$	0.43			$	0.43			$	—
	Series D preferred shares	$	1.38			$	1.03			$	0.34
	Series E preferred shares	$	137.50			$	103.13			$	34.38
	Year ended December 31, 2018
	Common shares	$	1.57			$	1.17			$	0.40
	Series D preferred shares	$	1.38			$	1.03			$	0.34
	Series E preferred shares	$	137.50			$	103.13			$	34.38
	Year ended December 31, 2019
	Common shares	$	1.61			$	1.20			$	0.41
	Series D preferred shares	$	1.21			$	1.03			$	0.18
	Series E preferred shares	$	137.50			$	103.13			$	34.38

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