Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Common Stock	Additional Paid-In Capital	Accumulated other comprehensive income (loss)	Distributions in excess of accumulated earnings	Total
Balance at Dec. 31, 2019	$ 11	$ 1,356,794	$ (4,682)	$ (565,727)	$ 786,396
Balance (in shares) at Dec. 31, 2019	107,269
Increase (Decrease) in Stockholders' Equity
Comprehensive income (loss)			(18,353)	(1,071)	(19,424)
Distributions				(9,654)	(9,654)
Balance at Mar. 31, 2020	$ 11	1,356,794	(23,035)	(576,452)	757,318
Balance (in shares) at Mar. 31, 2020	107,269
Balance at Dec. 31, 2019	$ 11	1,356,794	(4,682)	(565,727)	786,396
Balance (in shares) at Dec. 31, 2019	107,269
Increase (Decrease) in Stockholders' Equity
Comprehensive income (loss)					(21,422)
Balance at Jun. 30, 2020	$ 11	1,357,131	(22,958)	(588,181)	746,003
Balance (in shares) at Jun. 30, 2020	107,328
Balance at Dec. 31, 2019	$ 11	1,356,794	(4,682)	(565,727)	786,396
Balance (in shares) at Dec. 31, 2019	107,269
Balance at Dec. 31, 2020	$ 11	1,357,131	(17,311)	(571,740)	768,091
Balance (in shares) at Dec. 31, 2020	107,328
Balance at Mar. 31, 2020	$ 11	1,356,794	(23,035)	(576,452)	757,318
Balance (in shares) at Mar. 31, 2020	107,269
Increase (Decrease) in Stockholders' Equity
Comprehensive income (loss)			77	(2,075)	(1,998)
Distributions				(9,654)	(9,654)
Equity-based compensation		337			337
Equity-based compensation (in shares)	59
Balance at Jun. 30, 2020	$ 11	1,357,131	(22,958)	(588,181)	746,003
Balance (in shares) at Jun. 30, 2020	107,328
Balance at Dec. 31, 2020	$ 11	1,357,131	(17,311)	(571,740)	768,091
Balance (in shares) at Dec. 31, 2020	107,328
Increase (Decrease) in Stockholders' Equity
Comprehensive income (loss)			3,613	(6,460)	(2,847)
Distributions				(9,660)	(9,660)
Balance at Mar. 31, 2021	$ 11	1,357,131	(13,698)	(587,860)	755,584
Balance (in shares) at Mar. 31, 2021	107,328
Balance at Dec. 31, 2020	$ 11	1,357,131	(17,311)	(571,740)	768,091
Balance (in shares) at Dec. 31, 2020	107,328
Increase (Decrease) in Stockholders' Equity
Comprehensive income (loss)					17,575
Balance at Jun. 30, 2021	$ 11	1,357,469	(9,425)	(581,370)	766,685
Balance (in shares) at Jun. 30, 2021	107,395
Balance at Mar. 31, 2021	$ 11	1,357,131	(13,698)	(587,860)	755,584
Balance (in shares) at Mar. 31, 2021	107,328
Increase (Decrease) in Stockholders' Equity
Comprehensive income (loss)			4,273	16,149	20,422
Distributions				(9,659)	(9,659)
Equity-based compensation		338			338
Equity-based compensation (in shares)	67
Balance at Jun. 30, 2021	$ 11	$ 1,357,469	$ (9,425)	$ (581,370)	$ 766,685
Balance (in shares) at Jun. 30, 2021	107,395