Condensed Consolidated Statements of Stockholders' Deficiency - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019		Sep. 30, 2020	Sep. 30, 2019
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance (in shares)				148,084,900
Beginning Balance	$ (669,204)	$ (606,696)		$ (685,016)	$ (547,366)
Net income	38,139	36,008		60,682	90,348
Total other comprehensive income	162	344		1,141	1,530
Distributions and dividends on common stock	(31,563)	(58,724)		(93,684)	(176,298)
Restricted stock grant	0	0		0	0
Issuance of common stock, net of offering costs				52,563
Surrender of shares in connection with restricted stock vesting	(2,124)	(1,953)		(2,186)	(2,174)
Stock-based compensation	$ 2,471	2,348		7,012	7,122
Distributions to non-controlling interest				(448)	(285)
Other				$ 80
Ending Balance (in shares)	153,293,358			153,293,358
Ending Balance	$ (662,119)	$ (628,673)		$ (662,119)	$ (628,673)
Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance (in shares)	153,484,477	140,953,900		148,084,900	140,914,642
Beginning Balance	$ 15,348	$ 14,095		$ 14,808	$ 14,092
Restricted stock grant (in shares)	20,000			425,000	60,000
Restricted stock grant	$ 2			$ 43	$ 6
Issuance of common stock (in shares)				5,000,000
Issuance of common stock, net of offering costs				$ 500
Surrender of shares in connection with restricted stock vesting (in shares)	(211,119)	(200,926)		(216,542)	(221,668)
Surrender of shares in connection with restricted stock vesting	$ (21)	$ (19)		$ (22)	$ (22)
Ending Balance (in shares)	153,293,358	147,790,623		153,293,358	147,790,623
Ending Balance	$ 15,329	$ 14,780		$ 15,329	$ 14,780
Additional Paid-In
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	0	0		0	0
Distributions and dividends on common stock	(366)	(414)		(56,868)	(4,964)
Restricted stock grant	(2)			(43)	(6)
Issuance of common stock, net of offering costs				52,063
Surrender of shares in connection with restricted stock vesting	(2,103)	(1,934)		(2,164)	(2,152)
Stock-based compensation	2,471	2,348		7,012	7,122
Ending Balance	0	0		0	0
Accumulated Deficit
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	(663,723)	(597,786)		(678,464)	(542,169)
Net income	38,139	36,008		60,682	90,268
Distributions and dividends on common stock	(31,197)	(58,310)		(36,816)	(171,334)
Other				80
Ending Balance	(656,781)	(620,792)		(656,781)	(620,792)
Accumulated Other Comprehensive Loss
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	(20,829)	(23,493)		(21,808)	(19,982)
Total other comprehensive income	162	344		1,141	1,530
Ending Balance	(20,667)	(23,149)		(20,667)	(23,149)
Non-controlling Interest
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	0	488		448	693
Net income					80
Distributions to non-controlling interest				(448)	(285)
Ending Balance	$ 0	488		0	488
Impact of adoption of new accounting standards
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance				(2,263)	(1,550)
Impact of adoption of new accounting standards | Accumulated Deficit
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance				$ (2,263)	3,147
Impact of adoption of new accounting standards | Accumulated Other Comprehensive Loss
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance					(4,697)
2019 Stock Dividend
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Effect of stock dividend		$ 0	[1]		$ 0	[2]
2019 Stock Dividend | Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Effect of stock dividend (in shares)		7,037,649	[1]		7,037,649	[2]
Effect of stock dividend		$ 704	[1]		$ 704	[2]
2019 Stock Dividend | Accumulated Deficit
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Effect of stock dividend		$ (704)	[1]		$ (704)	[2]

[1] Represents the effect of the September 27, 2019 stock dividend on the third quarter 2019 common-stock activity.

[2] Represents the effect of the September 27, 2019 stock dividend on the third quarter 2019 common-stock activity.