Equity and EPS - Computations (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2022	Sep. 30, 2021	Nov. 16, 2021
Operations:
Net income	$ 23,628	$ 25,362	$ 37,371	$ 23,673	$ 20,059	$ 15,427	$ 86,361	$ 59,159
Net loss attributable to noncontrolling interest	180			203			444	279
Less: Income attributable to participating securities (unvested shares and units), basic	(188)			(175)			(688)	(471)
Less: Income attributable to participating securities (unvested shares and units), diluted	(188)			(175)			(688)	(471)
Net income used in Earnings Per Common Share calculation, basic	23,620			23,701			86,117	58,967
Net income used in Earnings Per Common Share calculation, diluted	$ 23,620			$ 23,701			$ 86,117	$ 58,967
Share information:
Basic weighted average common shares (in shares)	22,008,381			21,981,201			22,000,026	20,293,818
Diluted weighted average common shares (in shares)	22,228,814			21,981,201			22,000,026	20,293,818
Basic EPS (in dollars per share)	$ 1.07			$ 1.08			$ 3.91	$ 2.91
Diluted EPS (in dollars per share)	$ 1.06			$ 1.08			$ 3.91	$ 2.91
Convertible Senior Notes, 1.88% (fixed rate) due 2041 | Convertible Debt
Share information:
Conversion price (in dollars per share)									$ 96.24
Restricted Stock Units (RSUs)
Share information:
Participating securities (in shares)							176,398	163,024