XML 59 R43.htm IDEA: XBRL DOCUMENT
v3.20.4

STOCK-BASED COMPENSATION PLANS (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2020
STOCK-BASED COMPENSATION PLANS |
Schedule of Activity in this long-term incentive program | Activity in this long-term incentive program is as follows: ​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Stock Options
​ | ​ | ​ | ​ | Weighted-
​ | ​ | ​ | ​ | average Exercise
​ |  | Outstanding |  | Price of Shares
Outstanding at December 31, 2018 |  | 1,644,361 | ​ | $ | 38.36
Granted |  | 199,110 | ​ |  | 59.41
Exercised |  | (331,315) | ​ |  | 30.42
Forfeited |  | (9,162) | ​ |  | 51.29
Outstanding at December 31, 2019 |  | 1,502,994 | ​ |  | 42.82
Granted |  | 254,496 | ​ |  | 51.68
Exercised |  | (197,564) | ​ |  | 32.65
Forfeited |  | (17,667) | ​ |  | 50.97
Outstanding at December 31, 2020 |  | 1,542,259 | ​ |  | 45.49
Exercisable at December 31, 2020 |  | 978,833 | ​ | $ | 40.77
​
Schedule of information about stock options outstanding under the Company's stock option plan | The following table summarizes the information about stock options outstanding under the Company’s stock option plan at December 31, 2020: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Options outstanding | ​ | Options exercisable
​ | ​ | ​ | ​ | Weighted- | ​ | Weighted- | ​ | ​ | ​ | Weighted-
​ | ​ | ​ | ​ | average | ​ | average | ​ | ​ | ​ | average
​ | ​ | ​ | ​ | Exercise | ​ | Remaining | ​ | ​ | ​ | Exercise
Range of Exercise Price |  | Shares |  | Price |  | Life (years) |  | Shares |  | Price
$0.00 – $28.00 |  | 50,619 | ​ | $ | 23.95 |  | 4.75 |  | 50,619 | ​ | $ | 23.95
$28.001 – $29.00 |  | 52,014 | ​ |  | 28.78 |  | 1.22 |  | 52,014 | ​ |  | 28.78
$29.001 – $30.00 |  | 104,045 | ​ |  | 29.79 |  | 2.21 |  | 104,045 | ​ |  | 29.79
$30.001 – $40.00 |  | 536,831 | ​ |  | 37.12 |  | 4.37 |  | 493,761 | ​ |  | 37.04
$40.001 – $60.00 |  | 798,750 | ​ |  | 55.61 |  | 7.86 |  | 278,394 | ​ |  | 56.78
TOTAL |  | 1,542,259 | ​ | $ | 45.49 |  | 5.94 |  | 978,833 | ​ | $ | 40.77
​
Schedule of valuation assumptions used to estimate value of stock options | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2020 |  | 2019 |  | 2018 |
Weighted-average Fair Value of Options Granted | ​ | $ | 10.86 | ​ | $ | 14.16 | ​ | $ | 13.44 | ​
Assumptions: | ​ |  | ​ | ​ |  |  | ​ |  |  | ​
Weighted-average expected life (in years) | ​ |  | 6.50 | ​ |  | 6.50 | ​ |  | 6.50 | ​
Future dividend yield | ​ |  | 2.57 | % |  | 2.73 | % |  | 2.91 | %
Share price volatility | ​ |  | 29.29 | % |  | 29.31 | % |  | 29.44 | %
Weighted-average risk-free interest rate | ​ |  | 0.67 | % |  | 2.44 | % |  | 2.82 | %
​
Schedule of activity unvested restricted stock awards | A summary of the status of the Company’s unvested restricted stock awards as of December 31, 2020, and changes during the twelve months ended December 31, 2020 and 2019, is presented below: ​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Restricted | ​ | Weighted-average
​ |  | Shares |  | grant date fair value
Unvested at December 31, 2018 |  | 221,063 | ​ | $ | 37.72
Awards |  | 108,556 | ​ |  | 42.53
Forfeitures |  | (2,365) | ​ |  | 52.47
Vestings |  | (130,466) | ​ |  | 29.71
Unvested at December 31, 2019 |  | 196,788 | ​ |  | 45.58
Awards |  | 52,132 | ​ |  | 51.64
Forfeitures |  | (12,884) | ​ |  | 37.14
Vestings |  | (59,628) | ​ |  | 47.80
Unvested at December 31, 2020 |  | 176,408 | ​ | $ | 47.24
​

X
- References No definition available. + Details
Name: | us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=120381028&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 for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock
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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock
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