XML 54 R41.htm IDEA: XBRL DOCUMENT
v3.21.1

Share-Based Compensation (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2021
Share-Based Compensation |
Schedule of stock option activity | Activity in our stock option plans for 2004, 2012, 2019 and 2020 as well as stock options and warrants assumed from the CSFL merger is summarized in the following table. All information has been retroactively adjusted for stock dividends and stock splits.
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | Weighted | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted | ​ | Average | ​ | Aggregate | ​
​ | ​ | ​ | ​ | Average | ​ | Remaining | ​ | Intrinsic | ​
​ |  | Shares |  | Price |  | (Yrs.) |  | (000's) |
Outstanding at January 1, 2021 | ​ | 256,425 | ​ | $ | 59.01 | ​ | ​ | ​ | ​ | ​ | ​
Exercised | ​ | (37,854) | ​ |  | 46.81 | ​ | ​ | ​ |  | ​ | ​
Outstanding at March 31, 2021 | ​ | 218,571 | ​ |  | 61.13 | ​ | 4.52 | ​ | $ | 4,584 | ​
Exercisable at March 31, 2021 | ​ | 218,571 | ​ | ​ | 61.13 | ​ | 4.52 | ​ | $ | 4,584 | ​
Summary of nonvested restricted stock | Nonvested restricted stock for 2021 is summarized in the following table. All information has been retroactively adjusted for stock dividends and stock splits. ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | Weighted- |
​ | ​ | ​ | ​ | Average |
​ | ​ | ​ | ​ | Grant-Date |
Restricted Stock | ​ | Shares | ​ | Fair Value |
Nonvested at January 1, 2021 |  | 11,004 | ​ | $ | 59.42 | ​
Vested |  | (2,082) | ​ |  | 52.95 | ​
Nonvested at March 31, 2021 |  | 8,922 | ​ | $ | 60.94 | ​
Summary of nonvested RSUs | Outstanding RSUs for the three months ended March 31, 2021 is summarized in the following table. ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | Weighted- |
​ | ​ | ​ | ​ | Average |
​ | ​ | ​ | ​ | Grant-Date |
Restricted Stock Units | ​ | Shares | ​ | Fair Value |
Outstanding at January 1, 2021 |  | 750,821 | ​ | $ | 60.88 | ​
Granted |  | 281,116 | ​ |  | 81.04 | ​
Vested | ​ | (59,518) | ​ | ​ | 61.19 | ​
Forfeited | ​ | (2,496) | ​ | ​ | 56.34 | ​
Outstanding at March 31, 2021 |  | 969,923 | ​ | $ | 66.82 | ​

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 the changes in outstanding nonvested shares. + 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 (c)(2) -URI http://asc.fasb.org/extlink&oid=120381028&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 number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + 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 (c)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock
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