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Stock-Based Compensation Plans (Tables) | 12 Months Ended
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Dec. 31, 2013
Stock-Based Compensation |
Schedule of unvested restricted stock unit activity |
|  |  |  |  |  | Aggregate |
|  |  |  | Weighted- |  | Intrinsic |
|  | Shares |  | Average |  | Value * |
Unvested Restricted Stock Units (RSUs) |  | (in thousands) |  | Price |  | (in thousands) |
Outstanding at January 1, 2013 |  | 264 |  | $ | 33.23 |  |  |
Awarded |  | 359 |  | 31.96 |  |  |
Vested |  | (174 | ) | 32.62 |  |  |
Forfeited |  | (1 | ) | 32.47 |  |  |
Outstanding at December 31, 2013 |  | 448 |  | $ | 32.48 |  | $ | 16,447 |
Outstanding and expected to vest at December 31, 2013 |  | 436 |  | $ | 32.45 |  | $ | 16,021 |
* The intrinsic value is calculated using the closing price per share of $36.73 as reported by the New York Stock Exchange on December 31, 2013.
Assumptions used to determine the fair value of stock options granted | The assumptions used in the Black-Scholes option pricing model for options granted in 2011 were as follows:
Number |  |  |  | Risk- |  |  |  |  |  |  |  |  |  |  |
of Options |  |  |  | Free |  |  |  |  |  |  |  |  |  |  |
Granted |  | Grant |  | Interest |  | Dividend |  | Expected |  |  |  |  |  | Fair |
(in thousands) |  | Date |  | Rate |  | Yield |  | Life |  | Volatility |  | Exercise Price |  | Value |
1994 Plan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
1,362 |  | 02/03/11 |  | 2.62 | % | 1.75 | % | 6.2 years |  | 39.0 | % | $29.66 to $32.63 |  | $ | 10.33 |
1995 Plan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
30 |  | 02/15/11 |  | 2.92 | % | 1.76 | % | 6.6 years |  | 38.0 | % | $29.58 |  | $ | 10.49 |
Non-Qualified Stock Options |
Stock-Based Compensation |
Summary of stock option activity |
|  |  |  |  |  | Weighted- |  |  |
|  |  |  | Weighted- |  | Average |  | Aggregate |
|  |  |  | Average |  | Remaining |  | Intrinsic |
|  | Shares |  | Exercise |  | Contractual |  | Value* |
Non-Qualified Stock Options |  | (in thousands) |  | Price |  | Life |  | (in thousands) |
Outstanding at January 1, 2013 |  | 1,907 |  | $ | 31.58 |  | 3.8 |  | $ | 5,347 |
Exercised |  | (512 | ) | $ | 29.39 |  |  |  |  |
Forfeited |  | (374 | ) | $ | 40.65 |  |  |  |  |
Outstanding at December 31, 2013 |  | 1,021 |  | $ | 29.35 |  | 4.0 |  | $ | 7,539 |
Outstanding and expected to vest at December 31, 2013 |  | 1,003 |  | $ | 29.35 |  | 4.0 |  | $ | 7,404 |
Exercisable at December 31, 2013 |  | 573 |  | $ | 29.14 |  | 3.9 |  | $ | 4,352 |
* The intrinsic value represents the amount by which the fair market value of the underlying common stock exceeds the exercise price of the option, using the closing price per share of $36.73 as reported by the New York Stock Exchange on December 31, 2013.
Unvested Stock Options |
Stock-Based Compensation |
Summary of stock option activity |
|  |  |  | Weighted- |
|  |  |  | Average |
|  | Shares |  | Grant-Date |
Unvested Options |  | (in thousands) |  | Fair Value |
Unvested at January 1, 2013 |  | 826 |  | $ | 10.25 |
Vested |  | (377 | ) | $ | 10.17 |
Forfeited |  | (1 | ) | $ | 10.33 |
Unvested at December 31, 2013 |  | 448 |  | $ | 10.31 |

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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited 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 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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