SHAREHOLDERS' EQUITY (Tables)

9 Months Ended

Sep. 30, 2017

Stockholders' Equity Note [Abstract]

COMMON SHARES ISSUED AND OUTSTANDING

The following table presents common shares issued and outstanding:

	Three months ended September 30,				Nine months ended September 30,
	2017		2016		2017		2016
Shares issued, balance at beginning of period	176,580		176,575		176,580		176,240
Shares issued	—		—		—		335
Total shares issued at end of period	176,580		176,575		176,580		176,575
Treasury shares, balance at beginning of period	(93,377	)	(85,921	)	(90,139	)	(80,174	)
Shares repurchased	(51	)	(2,252	)	(4,284	)	(8,499	)
Shares reissued from treasury	5		37		1,000		537
Total treasury shares at end of period	(93,423	)	(88,136	)	(93,423	)	(88,136	)
Total shares outstanding	83,157		88,439		83,157		88,439

SHARE REPURCHASES

The following table presents share repurchases:

	Three months ended September 30,				Nine months ended September 30,
	2017		2016		2017		2016
In the open market:
Total shares(1)	49		2,232		3,932		8,236
Total cost	$	3,237	$	124,948	$	261,180	$	434,948
Average price per share(2)	$	65.80	$	56.00	$	66.43	$	52.81
From employees:(3)
Total shares	2		20		352		263
Total cost	$	110	$	1,088	$	24,479	$	14,137
Average price per share(2)	$	64.04	$	54.13	$	69.53	$	53.68
Total shares repurchased:
Total shares	51		2,252		4,284		8,499
Total cost	$	3,347	$	126,036	$	285,659	$	449,085
Average price per share(2)	$	65.74	$	55.98	$	66.68	$	52.84

(1) Total shares repurchased in the open market for the nine months ended September 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.