XML 54 R38.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Stock Options (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity | Following is a summary of activity in the Restricted Stock Awards for the periods indicated:
| 2016 | 2015 | 2014
| Shares | Exercise Price* | Shares | Exercise Price* | Shares | Exercise Price*
Options outstanding at beginning of year | 32,616 |  | $ | 53.31 |  | 12,043 |  | $ | 44.10 |  | 10,724 |  | $ | 32.49 |
Granted | 27,440 |  | 55.17 |  | 26,004 |  | 54.14 |  | 6,000 |  | 53.51 |
Exercised | (11,909 | ) | 52.67 |  | (5,431 | ) | 36.85 |  | (4,681 | ) | 29.56 |
Canceled | (2,526 | ) | 53.57 |  | — |  | — |  | — |  | — |
Options outstanding at end of year | 45,621 |  | 54.58 |  | 32,616 |  | 53.31 |  | 12,043 |  | 44.10 |
*Weighted Averages
Qualified Stock Options |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Schedule of Share-based Compensation, Stock Options, Activity | Following is a summary of activity in the Incentive Stock Option Plans for the periods indicated:
| 2016 | 2015 | 2014
| Shares | Exercise Price* | Shares | Exercise Price* | Shares | Exercise Price*
Options outstanding at beginning of year | 254,195 |  | $ | 34.64 |  | 301,800 |  | $ | 30.73 |  | 292,350 |  | $ | 26.68 |
Granted | 21,000 |  | 54.87 |  | 29,500 |  | 53.95 |  | 48,250 |  | 52.67 |
Exercised | (43,775 | ) | 26.59 |  | (75,355 | ) | 26.11 |  | (27,700 | ) | 24.33 |
Canceled | (10,600 | ) | 50.68 |  | (1,750 | ) | 53.61 |  | (11,100 | ) | 35.42 |
Options outstanding at end of year | 220,820 |  | 37.39 |  | 254,195 |  | 34.64 |  | 301,800 |  | 30.73 |
Options exercisable at end of year | 136,220 |  | $ | 29.66 |  | 143,345 |  | $ | 25.69 |  | 172,450 |  | $ | 22.30 |
Options available for grant at end of year | 353,450 |  |  |  | 370,750 |  |  |  | 28,950 |  |  |
*Weighted Averages
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range | Options outstanding and exercisable at December 31, 2016 were as follows:
Qualified Stock Options | Options Outstanding |  | Options Exercisable
| Shares |  | Remaining Contractual Life (yrs)* | Exercise Price* |  | Shares | Exercise Price*
Range of Exercise Price |  |  |  |  |  |  |  |  |  |
$11.45 - $22.55 | 44,320 |  | 2.03 | $ | 15.08 |  |  | 44,320 |  | $ | 15.08 |
$24.69 - $42.70 | 96,350 |  | 5.30 | $ | 34.07 |  |  | 73,750 |  | $ | 32.64 |
$49.44 - $54.87 | 80,150 |  | 8.21 | $ | 53.72 |  |  | 18,150 |  | $ | 53.17 |
Total | 220,820 |  |  |  |  |  | 136,220 |  |  |
*Weighted Averages
Non Qualified Options |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Schedule of Share-based Compensation, Stock Options, Activity | Following is a summary of activity in the Non-Qualified Stock Option Plans for the periods indicated:
| 2016 | 2015 | 2014
| Shares | Exercise Price* | Shares | Exercise Price* | Shares | Exercise Price*
Options outstanding at beginning of year | 127,300 |  | $ | 32.05 |  | 132,100 |  | $ | 31.30 |  | 114,700 |  | $ | 24.87 |
Granted | — |  | — |  | — |  | — |  | 29,000 |  | 53.51 |
Exercised | (14,900 | ) | 13.73 |  | (4,800 | ) | 11.45 |  | (11,600 | ) | 23.29 |
Canceled | — |  | — |  | — |  | — |  | — |  | — |
Options outstanding at end of year | 112,400 |  | 34.48 |  | 127,300 |  | 32.05 |  | 132,100 |  | 31.30 |
Options exercisable at end of year | 85,000 |  | $ | 29.61 |  | 83,100 |  | $ | 24.54 |  | 71,100 |  | $ | 19.85 |
Options available for grant at end of year | 207,608 |  |  |  | 232,522 |  |  |  | 258,526 |  |  |
*Weighted Averages
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range | Options outstanding and exercisable as of December 31, 2016 were as follows:
Non-Qualified Stock Options | Options Outstanding |  | Options Exercisable
| Shares |  | Remaining Contractual Life (yrs)* | Exercise Price* |  | Shares |  |  | Exercise Price*
Range of Exercise Price |  |  |  |  |  |  |  |  |  |  |
$11.45 - $22.55 | 18,400 |  | 2.36 | $ | 11.45 |  |  | 18,400 |  |  | $ | 11.45 |
$24.69 - $42.70 | 65,000 |  | 4.51 | 32.50 |  |  | 55,000 |  |  | 30.65 |
$49.44 - $54.87 | 29,000 |  | 7.37 | $ | 53.51 |  |  | 11,600 |  |  | $ | 53.51 |
Total | 112,400 |  |  |  |  |  | 85,000 |  |  |  |
*Weighted Averages

X
- Definition Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTextBlock
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 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
Name: | us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_AwardTypeAxis=alg_QualifiedStockOptionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=alg_NonQualifiedOptionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |