SHAREHOLDERS' EQUITY (Tables)

6 Months Ended

Jun. 30, 2017

Stockholders' Equity Note [Abstract]

COMMON SHARES ISSUED AND OUTSTANDING

The following table presents our common shares issued and outstanding:

	Three months ended June 30,				Six months ended June 30,
	2017		2016		2017		2016
Shares issued, balance at beginning of period	176,580		176,556		176,580		176,240
Shares issued	—		19		—		335
Total shares issued at end of period	176,580		176,575		176,580		176,575
Treasury shares, balance at beginning of period	(91,410	)	(83,653	)	(90,139	)	(80,174	)
Shares repurchased	(2,004	)	(2,337	)	(4,233	)	(6,247	)
Shares reissued from treasury	37		69		995		500
Total treasury shares at end of period	(93,377	)	(85,921	)	(93,377	)	(85,921	)
Total shares outstanding	83,203		90,654		83,203		90,654

SHARE REPURCHASES

The following table presents our share repurchases:

	Three months ended June 30,				Six months ended June 30,
	2017		2016		2017		2016
In the open market:
Total shares(1)	1,987		2,300		3,883		6,004
Total cost	$	129,960	$	125,000	$	257,943	$	310,000
Average price per share(2)	$	65.40	$	54.35	$	66.44	$	51.63
From employees:(3)
Total shares	17		37		350		243
Total cost	$	1,110	$	2,039	$	24,370	$	13,050
Average price per share(2)	$	64.82	$	54.70	$	69.55	$	53.65
Total shares repurchased:
Total shares	2,004		2,337		4,233		6,247
Total cost	$	131,070	$	127,039	$	282,313	$	323,050
Average price per share(2)	$	65.40	$	54.36	$	66.69	$	51.71

(1) The six months ended June 30 2016 includes 1,358,380 common shares acquired under the accelerated share repurchase program (see below for more detail).

(2) Calculated using whole numbers.

(3) To satisfy withholding tax liabilities upon the vesting of restricted stock and restricted stock units.