Net Income Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Net income									$ 100,584	$ 56,224	$ 95,677
Less income allocated to non-controlling interests									(560)	(363)	(384)
Less income allocated to participating securities:
Non-forfeitable dividends on participating securities									(531)	(458)	(397)
Income allocated to participating securities									(49)		(25)
Total net income allocated to participating securities									(580)	(458)	(422)
Net income available to common stockholders									99,444	55,403	94,871
Net income for diluted net income per share									$ 99,444	$ 55,403	$ 94,871
Shares for basic net income per share									39,894,000	39,156,000	39,179,000
Effect of dilutive securities:
Total effect of dilutive securities (in shares)									173,000		85,000
Shares for diluted net income per share									40,067,000	39,156,000	39,264,000
Basic net income per share (in dollars per share)	$ 0.44	$ 0.33	$ 1.37	$ 0.36	$ 0.32	$ 0.28	$ 0.46	$ 0.35	$ 2.49	$ 1.41	$ 2.42
Diluted net income per share (in dollars per share)	$ 0.44	$ 0.32	$ 1.36	$ 0.36	$ 0.32	$ 0.28	$ 0.46	$ 0.35	$ 2.48	$ 1.41	$ 2.42
Performance-based stock units
Effect of dilutive securities:
Stock options and performance-based stock units (in shares)									173,000		85,000
Performance-based stock units would be earned based on TSR targets					0					0