Share Incentive Plans, Assumptions for Options Granted Under 2015 Plan (Details) - 2015 Plan [Member] - Stock Options [Member] - $ / shares									12 Months Ended
	May 03, 2021	Feb. 18, 2021	Mar. 18, 2020	Oct. 24, 2019	Mar. 20, 2019	Mar. 07, 2018	May 17, 2017	Feb. 10, 2017	Dec. 31, 2022
February 10, 2017 [Member]
Share Incentive Plans [Abstract]
Number of options granted (in shares)								40,000
Options outstanding (in shares)									20,000
Number exercisable (in shares)									20,000
Exercise price (in dollars per share)									$ 13
Remaining lives									4 years 1 month 13 days
Risk free interest rate									1.89%
Expected volatility									27.44%
Expected life									6 years
Dividend yield									0.00%
Fair value at grant date (in dollars per share)									$ 3.98
May 17, 2017 [Member]
Share Incentive Plans [Abstract]
Number of options granted (in shares)							93,819
Options outstanding (in shares)									44,983
Number exercisable (in shares)									44,983
Exercise price (in dollars per share)									$ 15.41
Remaining lives									4 years 4 months 17 days
Risk free interest rate									1.76%
Expected volatility									26.92%
Expected life									6 years
Dividend yield									0.00%
Fair value at grant date (in dollars per share)									$ 4.6
March 7, 2018 [Member]
Share Incentive Plans [Abstract]
Number of options granted (in shares)						98,100
Options outstanding (in shares)									58,067
Number exercisable (in shares)									58,067
Exercise price (in dollars per share)									$ 21.21
Remaining lives									5 years 2 months 8 days
Risk free interest rate									2.65%
Expected volatility									28.76%
Expected life									6 years
Dividend yield									0.83%
Fair value at grant date (in dollars per share)									$ 6.37
March 20, 2019 [Member]
Share Incentive Plans [Abstract]
Number of options granted (in shares)					155,780
Options outstanding (in shares)									141,784
Number exercisable (in shares)									141,784
Exercise price (in dollars per share)									$ 47.58
Remaining lives									6 years 2 months 19 days
Risk free interest rate									2.34%
Expected volatility									30.95%
Expected life									6 years
Dividend yield									0.42%
Fair value at grant date (in dollars per share)									$ 15.63
October 24, 2019 [Member]
Share Incentive Plans [Abstract]
Number of options granted (in shares)				25,000
Options outstanding (in shares)									25,000
Number exercisable (in shares)									25,000
Exercise price (in dollars per share)									$ 20.89
Remaining lives									6 years 9 months 25 days
Risk free interest rate									1.58%
Expected volatility									31.93%
Expected life									6 years
Dividend yield									0.95%
Fair value at grant date (in dollars per share)									$ 6.27
March 18, 2020 [Member]
Share Incentive Plans [Abstract]
Number of options granted (in shares)			155,000
Options outstanding (in shares)									93,248
Number exercisable (in shares)									61,081
Exercise price (in dollars per share)									$ 14.85
Remaining lives									7 years 2 months 19 days
Risk free interest rate									0.79%
Expected volatility									35.72%
Expected life									6 years
Dividend yield									1.49%
Fair value at grant date (in dollars per share)									$ 4.41
February 18, 2021 [Member]
Share Incentive Plans [Abstract]
Number of options granted (in shares)		100,000
Options outstanding (in shares)									93,448
Number exercisable (in shares)									39,097
Exercise price (in dollars per share)									$ 51.75
Remaining lives									8 years 1 month 20 days
Risk free interest rate									0.56%
Expected volatility									28.69%
Expected life									6 years
Dividend yield									0.55%
Fair value at grant date (in dollars per share)									$ 13.77
May 3, 2021 [Member]
Share Incentive Plans [Abstract]
Number of options granted (in shares)	12,000
Options outstanding (in shares)									12,000
Number exercisable (in shares)									4,080
Exercise price (in dollars per share)									$ 47.76
Remaining lives									8 years 4 months 2 days
Risk free interest rate									0.84%
Expected volatility									29.03%
Expected life									6 years
Dividend yield									0.59%
Fair value at grant date (in dollars per share)									$ 13.06