Equity - Changes in Equity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period	$ 1,169,878	$ 1,182,980	$ 929,802	$ 921,344	$ 1,182,980	$ 921,344
Net income (loss)	19,215	894	38,076	(3,032)	20,109	35,044
Issuance of common stock	32,124	1,107	40,902	24,486
Repurchase of common stock	(111)	(1,674)	(109)	(1,415)
Dividends paid on common stock ($0.2500 per share)	(13,452)	(13,429)	(11,702)	(11,581)
Investment in business with noncontrolling interest		0
Investment in business with noncontrolling interest	0		5,294
Distribution to noncontrolling interest	(348)
Balance at end of period	$ 1,207,306	$ 1,169,878	$ 1,002,263	$ 929,802	$ 1,207,306	$ 1,002,263
Dividends paid on common stock (in dollars per share)	$ 0.2500	$ 0.2500	$ 0.2300	$ 0.2300
Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at the beginning of the period (in shares)	53,773	53,716	50,835	50,334	53,716	50,334
Balance at beginning of period	$ 538	$ 537	$ 508	$ 503	$ 537	$ 503
Issuance of common stock (in shares)	585	85	702	528
Issuance of common stock	$ 6	$ 1	$ 7	$ 5
Repurchase of common stock (in shares)	(2)	(28)	(2)	(27)
Balance at the ending of the period (in shares)	54,356	53,773	51,535	50,835	54,356	51,535
Balance at end of period	$ 544	$ 538	$ 515	$ 508	$ 544	$ 515
Additional Paid-in Capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period	650,499	651,121	471,698	448,632	651,121	448,632
Issuance of common stock	32,118	1,106	40,895	24,481
Repurchase of common stock	(111)	(1,674)	(109)	(1,415)
Investment in business with noncontrolling interest	(153)	(54)
Balance at end of period	682,353	650,499	512,484	471,698	682,353	512,484
Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period	513,593	525,936	457,596	472,209	525,936	472,209
Net income (loss)	19,484	1,086	38,225	(3,032)
Dividends paid on common stock ($0.2500 per share)	(13,452)	(13,429)	(11,702)	(11,581)
Balance at end of period	519,625	513,593	484,119	457,596	519,625	484,119
Noncontrolling Interests
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period	5,248	5,386	0	0	5,386	0
Net income (loss)	(269)	(192)	(149)	0
Investment in business with noncontrolling interest		54
Investment in business with noncontrolling interest	153		5,294
Distribution to noncontrolling interest	(348)
Balance at end of period	$ 4,784	$ 5,248	$ 5,145	$ 0	$ 4,784	$ 5,145