Changes in Equity (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at the beginning of the period	$ 1,464,141	$ 1,489,559	$ 1,430,525	$ 1,787,889
Net income (loss)	49,323	26,721	106,320	(283,996)
Other comprehensive income	1,301	137	1,638	3,315
Share-based compensation	2,471	3,491	10,163	13,586
Convertible note repayment allocated to conversion option	(929)		(929)
Issuance of common stock, net	(703)		(1,203)	(2,265)
Contributions from noncontrolling interests		1,140		6,519
Distributions to noncontrolling interests	(6,307)	(17,500)	(37,217)	(21,500)
Balance at the end of the period	1,509,297	1,503,548	1,509,297	1,503,548
Common Stock
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at the beginning of the period	50,771	50,279	50,279	50,026
Issuance of common stock, net	56		548	253
Balance at the end of the period	50,827	50,279	50,827	50,279
Additional Paid-in Capital
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at the beginning of the period	1,124,672	1,110,496	1,117,972	1,102,919
Share-based compensation	2,471	3,491	10,163	13,586
Convertible note repayment allocated to conversion option	(929)		(929)
Issuance of common stock, net	(759)		(1,751)	(2,518)
Balance at the end of the period	1,125,455	1,113,987	1,125,455	1,113,987
Retained Earnings
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at the beginning of the period	350,071	380,795	313,991	701,681
Net income (loss)	36,819	19,313	72,899	(301,573)
Balance at the end of the period	386,890	400,108	386,890	400,108
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at the beginning of the period	(40,597)	(42,530)	(42,100)	(45,449)
Other comprehensive income	781	236	2,284	3,155
Balance at the end of the period	(39,816)	(42,294)	(39,816)	(42,294)
Noncontrolling Interests
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at the beginning of the period	(20,776)	(9,481)	(9,617)	(21,288)
Net income (loss)	12,504	7,408	33,421	17,577
Other comprehensive income	520	(99)	(646)	160
Contributions from noncontrolling interests		1,140		6,519
Distributions to noncontrolling interests	(6,307)	(17,500)	(37,217)	(21,500)
Balance at the end of the period	$ (14,059)	$ (18,532)	$ (14,059)	$ (18,532)