Stockholders' Equity - Stock Option Grants, Activity And Expense (Details)	3 Months Ended
	Mar. 31, 2023 individual $ / shares shares	Mar. 31, 2022 $ / shares shares
Stockholders' Equity
Granted (in shares)	0	0
Other Disclosures
Number of option holders | individual	14
INDUS stock option plan
Granted (in shares)	0	0
Exercised (in shares)	0	0
Outstanding at end of period (in shares)	211,702	220,937
Weighted Avg. Exercise Price
Outstanding at end of period (in dollars per share) | $ / shares	$ 36.89	$ 36.47