XML 63 R47.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Stock-Based Compensation Plans (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2011
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] | Compensation expense for restricted stock and performance stock awards was determined based on the market price of PNMR stock on the date of grant reduced by the present value of future dividends, which will not be received during the vesting period, applied to the total number of shares that were anticipated to fully vest with the following weighted-average assumptions:
| Year Ended December 31,
| 2011 |  | 2010 |  | 2009
Expected quarterly dividends per share | $ | 0.125 |  |  | $ | 0.125 |  |  | $ | 0.125 |
Risk-free interest rate | 1.35 | % |  | 1.49 | % |  | 3.11 | %
The Company uses the Black-Scholes option pricing model to estimate the fair value of stock option awards with the following weighted-average assumptions (no options were granted in 2011):
|  | Year Ended December 31,
|  | 2010 |  | 2009
Dividend yield |  | 4.09 | % |  | 6.27 | %
Expected volatility |  | 41.55 | % |  | 42.03 | %
Risk-free interest rates |  | 2.13 | % |  | 1.56 | %
Expected life (years) |  | 4.6 |  |  | 4.5 |
Schedule of Option Activity Including Exerciseable and Future Grant Information [Table Text Block] | The following table summarizes activity in stock option plans:
| Stock Option Shares |  | Weighted Average Exercise Price |  | Aggregate Intrinsic Value |  |  | Weighted Average Remaining Contract Life
Outstanding at December 31, 2008 | 3,725,907 |  |  | $ | 21.54 |  |  |  |  |  |
Granted | 790,064 |  |  | $ | 8.23 |  |  |  |  |  |
Exercised | (6,236 | ) |  | $ | 10.22 |  |  |  |  |  |
Forfeited | (69,200 | ) |  | $ | 16.40 |  |  |  |  |  |
Expired | (166,516 | ) |  | $ | 21.32 |  |  |  |  |  |
Outstanding at December 31, 2009 | 4,274,019 |  |  | $ | 19.19 |  |  |  |  |  |
Granted | 618,708 |  |  | $ | 12.23 |  |  |  |  |  |
Exercised | (140,986 | ) |  | $ | 8.69 |  |  |  |  |  |
Forfeited | (106,966 | ) |  | $ | 11.02 |  |  |  |  |  |
Expired | (696,513 | ) |  | $ | 21.26 |  |  |  |  |  |
Outstanding at December 31, 2010 | 3,948,262 |  |  | $ | 18.33 |  |  |  |  |  |
Granted | — |  |  | $ | — |  |  |  |  |  |
Exercised | (493,590 | ) |  | $ | 11.39 |  |  |  |  |  |
Forfeited | (12,999 | ) |  | $ | 11.46 |  |  |  |  |  |
Expired | (239,444 | ) |  | $ | 24.71 |  |  |  |  |  |
Outstanding at December 31, 2011 | 3,202,229 |  |  | $ | 18.95 |  |  | $ | 1,610,851 |  | (1) |  | 4.80 years
Exercisable at December 31, 2011 | 2,738,362 |  |  | $ | 22.16 |  |  | $ | 1,146,714 |  |  |  | 4.29 years
(1) | At December 31, 2011, the exercise price of 1,591,648 outstanding stock options is greater than the closing price of PNMR common stock on that date so those options have no intrinsic value.
Schedule of Additional Stock Option Activity [Table Text Block] | The following table provides additional information concerning stock option activity:
|  | Year Ended December 31,
Options for PNMR Common Stock |  | 2011 |  | 2010 |  | 2009
Weighted-average grant date fair value of options granted |  | $ | — |  |  | $ | 3.05 |  |  | $ | 1.63 |
Total fair value of options that vested (in thousands) |  | $ | 1,189 |  |  | $ | 1,393 |  |  | $ | 1,179 |
Total intrinsic value of options exercised (in thousands) |  | $ | 2,616 |  |  | $ | 525 |  |  | $ | 15 |
Schedule of Nonvested Share Activity [Table Text Block] | The following table summarizes nonvested restricted stock activity for the year ended December 31, 2011:
Nonvested Restricted Stock |  | Shares |  | Weighted- Average Grant-Date Fair Value
Nonvested at beginning of period |  | 237,021 |  |  | $ | 9.24 |
Granted |  | 308,985 |  |  | $ | 13.79 |
Vested |  | (125,076 | ) |  | $ | 9.92 |
Forfeited |  | (2,200 | ) |  | $ | 13.67 |
Nonvested at end of period |  | 418,730 |  |  | $ | 12.36 |
Schedule of Nonvested Share Activity Additional Information [Table Text Block] | The following table provides additional information concerning restricted stock activity:
|  | Year Ended December 31,
Nonvested Restricted Stock |  | 2011 |  | 2010 |  | 2009
Weighted-average grant date fair value of shares granted |  | $ | 13.79 |  |  | $ | 9.26 |  |  | $ | 7.81 |
Total fair value of shares that vested (in thousands) |  | $ | 1,240 |  |  | $ | 1,365 |  |  | $ | 1,900 |

X
- Definition Schedule of Additional Stock Option Activity [Table Text Block] + References No definition available. + Details
Name: | pnm_ScheduleOfAdditionalStockOptionActivityTableTextBlock
Namespace Prefix: | pnm_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Schedule of Nonvested Share Activity Additional Information [Table Text Block] + References No definition available. + Details
Name: | pnm_ScheduleOfNonvestedShareActivityAdditionalInformationTableTextBlock
Namespace Prefix: | pnm_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Schedule of Option Activity Including Exerciseable and Future Grant Information [Table Text Block] + References No definition available. + Details
Name: | pnm_ScheduleOfOptionActivityIncludingExerciseableAndFutureGrantInformationTableTextBlock
Namespace Prefix: | pnm_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Tabular disclosure of the changes in outstanding nonvested shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 718 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph (c)(2) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfNonvestedShareActivityTableTextBlock
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 -Topic 718 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph (f)(2) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -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