XML 26 R42.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Share-Based Compensation (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2012
Share-based Compensation [Abstract] |
Assumption used for the grants | The following table illustrates the valuation assumptions used for the 2012, 2011 and 2010 grants:
| 2012 |  | 2011 |  | 2010
Expected volatility | 51 - 52% |  |  | 49 - 50% |  |  | 46 - 68% |
Weighted-average expected volatility | 52 | % |  | 49 | % |  | 46 | %
Expected dividend yield | 1.6 - 1.7% |  |  | 1.7 - 1.8% |  |  | 1.9 - 2.5% |
Weighted-average expected dividend yield | 1.7 | % |  | 1.8 | % |  | 2.4 | %
Expected term, in years | 0.2 - 6 |  |  | 6 |  |  | 1 - 6 |
Risk-free interest rate | 0.1 - 1.1% |  |  | 1.3 - 2.5% |  |  | 0.4 - 2.9% |
Stock options and SARs activity | The following table summarizes the activity during the year ended December 31, 2012 for stock option and SARs awards:
| Shares |  | Weighted-Average Exercise Price
Outstanding at beginning of year | 1,268,917 |  |  | $ | 20.40 |
Granted | 168,008 |  |  | 43.27 |
Exercised | (239,474 | ) |  | 17.36 |
Forfeited | (6,030 | ) |  | 36.06 |
Outstanding at end of year | 1,191,421 |  |  | $ | 24.16 |
Exercisable at end of year | 844,679 |  |  | $ | 18.92 |
Nonvested restricted shares activity | The following table summarizes the activity during the year ended December 31, 2012, for nonvested restricted share awards:
| Shares |  | Weighted-Average Grant Date Fair Value
Nonvested at beginning of year | 150,081 |  |  | $ | 26.39 |
Granted | 38,901 |  |  | 42.54 |
Vested | (46,628 | ) |  | 18.47 |
Forfeited | — |  |  | — |
Nonvested at end of year | 142,354 |  |  | $ | 33.40 |

X
- Definition Tabular disclosure of the changes in outstanding nonvested restricted stock units. + 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)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfNonvestedRestrictedStockUnitsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for stock options and stock appreciation rights that were outstanding at the beginning and end of the year, exercisable at the end of the year, and the number of stock options and stock appreciation rights 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
Name: | us-gaap_ScheduleOfShareBasedCompensationStockOptionsAndStockAppreciationRightsAwardActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- 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
Name: | us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_ShareBasedCompensationAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration