Share-Based Compensation Plans (Tables)
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12 Months Ended |
Dec. 31, 2014
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Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
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Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] |
The following table presents stock options outstanding during 2014, 2013 and 2012 under these plans (in thousands, except for per share data): | | | | | | | | | | | | | | | Number | | Weighted- Average Exercise Price | | Aggregate Intrinsic Value | Options outstanding at December 31, 2011 | | 2,621,347 |
| | $ | 47.01 |
| | $ | 20,769 |
| Options awarded | | 67,155 |
| | 58.76 |
| | | Options exercised | | (708,295 | ) | | 45.32 |
| | | Options forfeited | | (22,559 | ) | | 50.36 |
| | | Options expired | | (66,862 | ) | | 45.97 |
| | | Options outstanding at December 31, 2012 | | 1,890,786 |
| | 48.29 |
| | 11,748 |
| Options awarded | | 81,492 |
| | 55.74 |
| | | Options exercised | | (608,663 | ) | | 48.00 |
| | | Options forfeited | | (219,342 | ) | | 47.65 |
| | | Options expired | | (9,168 | ) | | 50.61 |
| | | Options outstanding at December 31, 2013 | | 1,135,105 |
| | 49.09 |
| | 19,564 |
| Options awarded | | — |
| | — |
| | | Options exercised | | (323,004 | ) | | 49.17 |
| | | Options forfeited | | (15,509 | ) | | 45.71 |
| | | Options expired | | (2,701 | ) | | 47.98 |
| | | Options outstanding at December 31, 2014 | | 793,891 |
| | $ | 49.05 |
| | $ | 8,725 |
| Options vested at: | | | | | | | December 31, 2012 | | 601,367 |
| | $ | 47.99 |
| | $ | 3,890 |
| December 31, 2013 | | 424,459 |
| | 49.49 | | 7,146 |
| December 31, 2014 | | 347,633 |
| | 48.85 | | 3,889 |
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Schedule of Share-based Compensation, Outstanding and Vested Stock Options [Table Text Block] |
The following table summarizes information concerning currently outstanding and vested stock options: | | | | | | | | | | | | | | | | | | Options Outstanding | | Options Vested | | | | | Weighted | | | | | | | | Weighted | | | | | Average | | Weighted | | | | Weighted | | Average | Range of | | | | Remaining | | Average | | | | Average | | Remaining | Exercise | | Number | | Contractual | | Exercise | | Number | | Exercise | | Contractual | Prices | | Outstanding | | Life (years) | | Price | | Vested | | Price | | Life (years) | $36.65 | | 190,832 |
| | 2.83 | | $36.65 | | 65,626 |
| | $36.65 | | 1.51 | 45.15 - 47.34 | | 33,574 |
| | 0.76 | | 47.09 | | 33,574 |
| | 47.09 | | 0.76 | 48.30 | | 39,557 |
| | 3.16 | | 48.30 | | 13,326 |
| | 48.30 | | 1.42 | 48.46 | | 169,422 |
| | 2.16 | | 48.46 | | 95,415 |
| | 48.46 | | 1.49 | 54.33 | | 78,904 |
| | 1.48 | | 54.33 | | 78,904 |
| | 54.33 | | 1.48 | 55.74 | | 78,108 |
| | 5.16 | | 55.74 | | 8,260 |
| | 55.74 | | 2.03 | 55.94 | | 125,285 |
| | 3.62 | | 55.94 | | 37,008 |
| | 55.94 | | 1.44 | 58.76 | | 78,209 |
| | 4.35 | | 58.76 | | 15,520 |
| | 58.76 | | 1.59 |
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Schedule of Share-based Compensation, Stock Options, Valuation Assumptions [Table Text Block] |
The fair value of options was determined as of the date of grant using a Black-Scholes option pricing model with the following weighted average assumptions: | | | | | | | | | | | | 2013 | | 2012 | Average risk-free interest rate1 | | 0.89 | % | | 0.93 | % | Dividend yield | | 2.80 | % | | 2.20 | % | Volatility factors | | 0.272 |
| | 0.280 |
| Weighted average expected life | | 4.9 years |
| | 4.9 years |
| Weighted average fair value | | $ | 9.67 |
| | $ | 11.48 |
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| | 1 | Average risk-free interest rate represents U.S. Treasury rates matched to the expected life of the options. |
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Schedule of Nonvested Share Activity [Table Text Block] |
The following represents a summary of the non-vested stock awards as of December 31, 2014 (in thousands): | | | | | | | | | Shares | | Weighted Average Grant Date Fair Value | Non-vested at January 1, 2012 | | 503,738 |
| | | Granted | | 197,058 |
| | $55.63 | Vested | | (76,192 | ) | | $47.32 | Forfeited | | (31,773 | ) | | $50.45 | Non-vested at December 31, 2012 | | 592,831 |
| | | Granted | | 211,791 |
| | $55.84 | Vested | | (66,648 | ) | | $35.93 | Forfeited | | (89,985 | ) | | $49.95 | Non-vested at December 31, 2013 | | 647,989 |
| | | Granted | | 206,621 |
| | $64.96 | Vested | | (140,820 | ) | | $44.56 | Forfeited | | (25,179 | ) | | $56.26 | Non-vested at December 31, 2014 | | 688,611 |
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