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EQUITY (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2012
EQUITY |
Schedule of shares repurchased from employees to satisfy tax obligations upon vesting's of restricted stock options |
Year Ended December 31 |  | Shares Repurchased |  | Aggregate Cost |  | Average Repurchase Price |
--- | --- | --- | --- | --- | --- | --- | ---
2010 |  |  | 1,331 |  | $ | 43,923 |  | $ | 33.00 |
2011 |  |  | 5,470 |  |  | 218,255 |  |  | 39.90 |
2012 |  |  | 9,175 |  |  | 344,166 |  |  | 37.51 |
Summary of stock option activity |
Year Ended December 31, 2011 |
--- | ---
|  | Number of Options |  | Weighted Avg. Exercise Price |  | Weighted Average Remaining Contractual Term (Years) |  | Aggregate Intrinsic Value |
Outstanding at January 1, 2011 |  |  | 625,750 |  | $ | 32.17 |  |  |  |  |  |  |
Granted |  |  | 146,500 |  |  | 33.29 |  |  |  |  |  |  |
Forfeited |  |  | — |  |  | — |  |  |  |  |  |  |
Exercised |  |  | (51,602 | ) |  | 22.77 |  |  |  |  |  |  |
Outstanding at December 31, 2011 |  |  | 720,648 |  |  | 33.07 |  |  | 6.79 |  |  | 5,617,669 |
Vested and expected to vest at December 31, 2011 |  |  | 674,469 |  |  | 32.74 |  |  | 6.66 |  |  | 5,248,211 |
Exercisable at December 31, 2011 |  |  | 409,149 |  | $ | 29.44 |  |  | 5.41 |  |  | 4,259,541 |
Year Ended December 31, 2012 |
--- | ---
|  | Number of Options |  | Weighted Avg. Exercise Price |  | Weighted Average Remaining Contractual Term (Years) |  | Aggregate Intrinsic Value |
Outstanding at January 1, 2012 |  |  | 720,648 |  | $ | 33.07 |  |  |  |  |  |  |
Granted |  |  | 64,000 |  |  | 37.36 |  |  |  |  |  |  |
Forfeited |  |  | (1,625 | ) |  | 32.02 |  |  |  |  |  |  |
Exercised |  |  | (62,575 | ) |  | 23.22 |  |  |  |  |  |  |
Outstanding at December 31, 2012 |  |  | 720,448 |  |  | 34.31 |  |  | 6.33 |  |  | 3,499,252 |
Vested and expected to vest at December 31, 2012 |  |  | 713,728 |  |  | 34.28 |  |  | 6.31 |  |  | 3,488,633 |
Exercisable at December 31, 2012 |  |  | 453,698 |  |  | 32.02 |  |  | 5.27 |  |  | 2,987,705 |
Summary of information relating to options granted and exercised | The following table summarizes information relating to options granted and exercised during 2010, 2011 and 2012 (in thousands, except fair value of options granted data):
|  | 2010 |  | 2011 |  | 2012 |
--- | --- | --- | --- | --- | --- | --- | ---
Weighted-average of fair value of options granted |  | $ | 18.26 |  | $ | 13.18 |  | $ | 15.27 |
Aggregate intrinsic value of options exercised |  |  | 2,141 |  |  | 822 |  |  | 938 |
Cash proceeds received upon exercise of options |  |  | 1,653 |  |  | 1,175 |  |  | 1,452 |
Tax benefits realized upon exercise of options |  |  | 594 |  |  | — |  |  | 362 |
Schedule of weighted-average assumptions using Black-Scholes option-pricing model for estimating fair value of each option granted |
|  | Options Granted in
--- | --- | ---
|  | 2010 |  | 2011 |  | 2012
Risk-free interest rate |  | 2.5% |  | 2.1% |  | 1.4%
Expected dividend yield |  | 2.5% |  | 2.7% |  | 2.5%
Expected life |  | 6.25 years |  | 6.25 years |  | 6.25 years
Expected volatility |  | 50% |  | 51% |  | 53%
Summary of restricted stock activity |
|  | Shares |  | Weighted Avg. Fair Value |
--- | --- | --- | --- | --- | ---
Unvested as of January 1, 2011 |  |  | 76,287 |  |  | 42.10 |
Granted |  |  | 22,925 |  |  | 34.64 |
Forfeited |  |  | — |  |  | — |
Vested and issued |  |  | (30,439 | ) |  | 38.21 |
Unvested as of December 31, 2011 |  |  | 68,773 |  |  | 41.39 |
|  | Shares |  | Weighted Avg. Fair Value |
--- | --- | --- | --- | --- | ---
Unvested as of January 1, 2012 |  |  | 68,773 |  |  | 41.39 |
Granted |  |  | 72,083 |  |  | 36.93 |
Forfeited |  |  | (1,499 | ) |  | 38.60 |
Vested and issued |  |  | (35,504 | ) |  | 37.58 |
Unvested as of December 31, 2012 |  |  | 103,853 |  |  | 39.63 |

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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of an entity's treasury stock, including the average cost per share, carrying basis for each class of treasury stock, description of share repurchase program authorized by an entity's board of directors, the number of shares repurchased, the cost of the shares repurchased, the remaining maximum dollar value of shares available for repurchase under the program, the treatment of the purchase price in excess of the current market value, number of shares held for each class of treasury stock, and other information necessary to a fair presentation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23309-112656 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23285-112656 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23315-112656 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 + Details
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