Changes in Equity (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at the beginning of the period	$ 1,542,945	$ 1,430,525
Net income	25,105	26,138
Other comprehensive income (loss)	(319)	(3,048)
Share-based compensation	1,586	3,507
Issuance of common stock, net	(1,236)	(694)
Contributions from noncontrolling interests	4,000
Distributions to noncontrolling interests		(13,500)
Balance at the end of the period	1,572,081	1,442,928
Common Stock
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at the beginning of the period	50,827	50,279
Issuance of common stock, net	111	298
Balance at the end of the period	50,938	50,577
Additional Paid-in Capital
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at the beginning of the period	1,127,385	1,117,972
Share-based compensation	1,586	3,507
Issuance of common stock, net	(1,347)	(992)
Balance at the end of the period	1,127,624	1,120,487
Retained Earnings
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at the beginning of the period	422,385	313,991
Net income	16,034	17,371
Balance at the end of the period	438,419	331,362
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at the beginning of the period	(46,741)	(42,100)
Other comprehensive income (loss)	(615)	(1,028)
Balance at the end of the period	(47,356)	(43,128)
Noncontrolling Interests
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at the beginning of the period	(10,911)	(9,617)
Net income	9,071	8,767
Other comprehensive income (loss)	296	(2,020)
Issuance of common stock, net		0
Contributions from noncontrolling interests	4,000
Distributions to noncontrolling interests		(13,500)
Balance at the end of the period	$ 2,456	$ (16,370)