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SHAREHOLDERS' EQUITY (TABLES)
12 Months Ended
Dec. 31, 2014
Stockholders' Equity Note [Abstract]  
COMMON SHARES ISSUED AND OUTSTANDING [Table Text Block]
 
 
 
 
 
 
 
 
 
Year ended December 31,
2014
 
2013
 
2012
 
 
 
 
 
 
 
 
 
 
Shares issued, balance at beginning of year
174,134

 
171,867

 
170,159

 
 
Shares issued
1,344

 
2,267

 
1,708

 
 
Total shares issued at end of year
175,478

 
174,134

 
171,867

 
 
 
 
 
 
 
 
 
 
Treasury shares, balance at beginning of year
(64,649
)
 
(53,947
)
 
(44,571
)
 
 
Shares repurchased
(11,752
)
 
(10,830
)
 
(9,376
)
 
 
Shares reissued from treasury
349

 
128

 

 
 
Total treasury shares at end of year
(76,052
)
 
(64,649
)
 
(53,947
)
 
 
 
 
 
 
 
 
 
 
Total shares outstanding
99,426

 
109,485

 
117,920

 
 
 
 
 
 
 
 
 
SHARE REPURCHASES [Table Text Block]
 
 
 
 
 
 
 
 
 
Year ended December 31,
2014
 
2013
 
2012
 
 
 
 
 
 
 
 
 
 
In the open market:
 
 
 
 
 
 
 
Total shares
11,317

 
7,362

 
6,057

 
 
Total cost
$
524,168

 
$
337,083

 
$
203,704

 
 
Average price per share(1)
$
46.32

 
$
45.79

 
$
33.63

 
 
 
 
 
 
 
 
 
 
From employees:(2)
 
 
 
 
 
 
 
Total shares
435

 
468

 
319

 
 
Total cost
$
19,034

 
$
19,080

 
$
10,483

 
 
Average price per share(1)
$
43.82

 
$
40.75

 
$
32.85

 
 
 
 
 
 
 
 
 
 
From founding shareholder:(3)
 
 
 
 
 
 
 
Total shares

 
3,000

 
3,000

 
 
Total cost
$

 
$
116,100

 
$
103,500

 
 
Average price per share(1)
$

 
$
38.70

 
$
34.50

 
 
 
 
 
 
 
 
 
 
Total
 
 
 
 
 
 
 
Total shares
11,752

 
10,830

 
9,376

 
 
Total cost
$
543,202

 
$
472,263

 
$
317,687

 
 
Average price per share(1)
$
46.22

 
$
43.61

 
$
33.88

 
 
 
 
 
 
 
 
 
(1)
Calculated using whole figures.
(2)
To satisfy withholding tax liabilities upon vesting of restricted stock, restricted stock units, and exercise of stock options. Share repurchases from employees are excluded from the authorized share repurchase plans noted above.
(3)
Represents privately negotiated repurchases of 3,000,000 of our common shares from Trident II, L.P and affiliated entities in both 2013 and 2012.