Net Income Per Share (Details 1) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Earnings Per Share [Abstract]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	12,235	14,017	12,132	12,182
Dilutive securities	516,000	608,000	546,000	691,000
Diluted (in shares)	21,730,000	21,556,000	21,735,000	21,561,000
Basic (in dollars per share)	$ 1.47	$ 1.19	$ 3.93	$ 2.91
Diluted (in dollars per share)	$ 1.43	$ 1.16	$ 3.83	$ 2.82