v2.4.0.8

SHAREHOLDERS' EQUITY (TABLES) | 6 Months Ended
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Jun. 30, 2013
Stockholders' Equity Note [Abstract] |
COMMON SHARES ISSUED AND OUTSTANDING [Table Text Block] |
|  | Three months ended June 30, |  | Six months ended June 30, |
|  | 2013 |  | 2012 |  | 2013 |  | 2012 |
| Shares issued, balance at beginning of period | 173,595 |  |  | 171,408 |  |  | 171,867 |  |  | 170,159 |  |
| Shares issued | 311 |  |  | 60 |  |  | 2,039 |  |  | 1,309 |  |
| Total shares issued at end of period | 173,906 |  |  | 171,468 |  |  | 173,906 |  |  | 171,468 |  |
| Treasury shares, balance at beginning of period | (57,289 | ) |  | (46,043 | ) |  | (53,947 | ) |  | (44,571 | ) |
| Shares repurchased | (5,122 | ) |  | (2,652 | ) |  | (8,491 | ) |  | (4,124 | ) |
| Shares reissued from treasury | 93 |  |  | — |  |  | 120 |  |  | — |  |
| Total treasury shares at end of period | (62,318 | ) |  | (48,695 | ) |  | (62,318 | ) |  | (48,695 | ) |
| Total shares outstanding | 111,588 |  |  | 122,773 |  |  | 111,588 |  |  | 122,773 |  |
SHARE REPURCHASES [Table Text Block] |
|  | Three months ended June 30, |  | Six months ended June 30, |
|  | 2013 |  | 2012 |  | 2013 |  | 2012 |
| In the open market: |  |  |  |  |  |  |  |
| Total shares | 5,048 |  |  | 2,643 |  |  | 5,048 |  |  | 3,840 |  |
| Total cost | $ | 225,000 |  |  | $ | 89,967 |  |  | $ | 225,000 |  |  | $ | 128,723 |  |
| Average price per share(1) | $ | 44.57 |  |  | $ | 34.04 |  |  | $ | 44.57 |  |  | $ | 33.52 |  |
| From employees: |  |  |  |  |  |  |  |
| Total shares | 74 |  |  | 9 |  |  | 443 |  |  | 284 |  |
| Total cost | $ | 3,256 |  |  | $ | 292 |  |  | $ | 17,925 |  |  | $ | 9,247 |  |
| Average price per share(1) | $ | 44.10 |  |  | $ | 33.23 |  |  | $ | 40.47 |  |  | $ | 32.54 |  |
| From founding shareholder:(2) |  |  |  |  |  |  |  |
| Total shares | — |  |  | — |  |  | 3,000 |  |  | — |  |
| Total cost | $ | — |  |  | $ | — |  |  | $ | 116,100 |  |  | $ | — |  |
| Average price per share(1) | $ | — |  |  | $ | — |  |  | $ | 38.70 |  |  | $ | — |  |
| Total shares repurchased: |  |  |  |  |  |  |  |
| Total shares | 5,122 |  |  | 2,652 |  |  | 8,491 |  |  | 4,124 |  |
| Total cost | $ | 228,256 |  |  | $ | 90,259 |  |  | $ | 359,025 |  |  | $ | 137,970 |  |
| Average price per share(1) | $ | 44.57 |  |  | $ | 34.03 |  |  | $ | 42.28 |  |  | $ | 33.45 |  |
(1) | Calculated using whole figures.
(2) During the first quarter of 2013, we privately negotiated repurchase of 3,000,000 common shares held by Trident II, L.P. and affiliated entities.

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