XML 48 R32.htm IDEA: XBRL DOCUMENT v3.25.4

Stock option and award plan: (Tables)

12 Months Ended

Dec. 31, 2025

Stock option and award plan:

Schedule of assumptions used for determining the fair value of options granted

​

​	​	​	​	​	​	​	​
​	​	Years Ended
​	​	December 31,					​
Black-Scholes Assumptions	​ ​ ​	2025	​ ​ ​	2024	​ ​ ​	2023
Dividend yield		7.1	%	6.0	%	5.8	%
Expected volatility		30.4	%	34.9	%	33.4	%
Risk-free interest rate		4.3	%	4.1	%	3.8	%
Expected life of the option term (in years)		4.1	​	4.1	​	4.1	​

Schedule of stock option activity

​

​	​	​	​	​	​
​	​ ​ ​	Number of	​ ​ ​	Weighted-Average
​	​ ​ ​	Options	​ ​ ​	Exercise Price
Outstanding at December 31, 2024		220,956	​	$	65.58
Granted		103,960	​	$	52.63
Cancelled and expired		(75,071)	​	$	65.09
Exercised—intrinsic value $0.1 million; cash received $0.2 million		(3,766)	​	$	46.70
Outstanding at December 31, 2025—$0 million intrinsic value and 7.3 years weighted-average remaining contractual term		246,079	​	$	60.55
Exercisable at December 31, 2025—$0 million intrinsic value and 6.0 years weighted-average remaining contractual term		129,153	​	$	62.56
Expected to vest—$0 million intrinsic value and 7.1 years weighted-average remaining contractual term		211,914	​	$	61.31

Schedule of non-vested restricted stock awards

​

​	​	​	​	​	​
​	​	​	​	Weighted-Average
​	​	​	​	Grant Date
Non-vested awards	​ ​ ​	Shares	​ ​ ​	Fair Value
Non-vested at December 31, 2024		1,489,277	​	$	64.45
Granted		1,497,592	​	$	35.48
Vested		(505,687)	​	$	61.97
Forfeited		(132,307)	​	$	63.93
Non-vested at December 31, 2025		2,348,875	​	$	46.55

​

​	​	​	​	​	​	​	​	​	​
​	​ ​ ​	Years Ended
​		December 31,
Additional Award Plan Information – Related to Stock Options & Restricted Stock (thousands)		2025		​ ​	2024		​ ​ ​	2023
Equity-based compensation expense	​	$	26,417	​	$	25,738	​	$	26,924
Income tax benefit related to stock options and restricted stock	​		2,412	​		2,469	​		3,307
Capitalized compensation expense related to stock options and restricted stock	​		3,521	​		3,100	​		3,541
Intrinsic value of stock options exercised	​		52	​		573	​		456
Fair value of shares of restricted stock vested	​		25,525	​		22,489	​		30,113

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
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

+ Details

Name:	us-gaap_ScheduleOfNonvestedShareActivityTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types: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
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (d)
-SubTopic 10
-Topic 718
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (e)
-SubTopic 10
-Topic 718
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

+ Details

Name:	us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types: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
-Topic 718
-SubTopic 10
-Subparagraph (f)(2)
-Name Accounting Standards Codification
-Paragraph 2
-Section 50
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

+ Details

Name:	us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration