Equity and EPS - Computations (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022	Nov. 16, 2021
Operations:
Net income	$ 31,964	$ 31,032	$ 25,362	$ 37,371	$ 62,996	$ 62,733
Net loss attributable to noncontrolling interest	162		198		201	264
Less: Income attributable to participating securities (unvested shares and units), basic	(324)		(217)		(633)	(535)
Less: Income attributable to participating securities (unvested shares and units), diluted	(324)		(217)		(633)	(535)
Net income used in earnings per common share calculation, basic	31,802		25,343		62,564	62,462
Net income used in earnings per common share calculation, diluted	$ 31,802		$ 25,343		$ 62,564	$ 62,462
Weighted average common shares
Basic weighted average common shares (in shares)	22,062,142		22,002,385		22,051,244	21,995,779
Diluted weighted average common shares (in shares)	22,139,663		22,002,385		22,106,113	21,995,779
Basic EPS (in dollars per share)	$ 1.44		$ 1.15		$ 2.84	$ 2.84
Diluted EPS (in dollars per share)	1.44		$ 1.15		2.83	$ 2.84
Convertible Senior Notes, 1.88% (fixed rate) due 2041 | Convertible Debt
Weighted average common shares
Conversion price (in dollars per share)	96.24				$ 96.24		$ 96.24
Impact to EPS (in usd per share)	$ 0.01
Restricted Stock Units (RSUs)
Weighted average common shares
Participating securities (in shares)					226,684	189,297