Condensed Consolidated Statements of Stockholders' Deficiency - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019		Jun. 30, 2020	Jun. 30, 2019
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance (in shares)				148,084,900
Beginning Balance	$ (718,999)	$ (590,101)		$ (685,016)	$ (547,366)
Net income	25,774	39,307		22,543	54,340
Total other comprehensive income	757	605		979	1,186
Distributions and dividends on common stock	(31,600)	(58,797)		(62,121)	(117,574)
Restricted stock grant	0	0		0	0
Issuance of common stock, net of offering costs	52,563			52,563
Surrender of shares in connection with restricted stock vesting	(62)	(48)		(62)	(221)
Stock-based compensation	2,283	2,338		4,541	4,774
Distributions to non-controlling interest				(448)	(285)
Other	$ 80			$ 80
Ending Balance (in shares)	153,084,900			153,084,900
Ending Balance	$ (669,204)	$ (606,696)		$ (669,204)	$ (606,696)
Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance (in shares)	148,084,900	140,899,065		148,084,900	140,914,642
Beginning Balance	$ 14,808	$ 14,090		$ 14,808	$ 14,092
Restricted stock grant (in shares)	405,000	60,000		405,000	60,000
Restricted stock grant	$ 41	$ 6		$ 41	$ 6
Issuance of common stock (in shares)	5,000,000			5,000,000
Issuance of common stock, net of offering costs	$ 500			$ 500
Surrender of shares in connection with restricted stock vesting (in shares)	(5,423)	(5,165)		(5,423)	(20,742)
Surrender of shares in connection with restricted stock vesting	$ (1)	$ (1)		$ (1)	$ (3)
Ending Balance (in shares)	153,484,477	148,001,595		153,484,477	148,001,595
Ending Balance	$ 15,348	$ 14,800		$ 15,348	$ 14,800
Additional Paid-In Capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	0	0		0	0
Distributions and dividends on common stock	(54,244)	(2,285)		(56,502)	(4,550)
Restricted stock grant	(41)	(6)		(41)	(6)
Issuance of common stock, net of offering costs	52,063			52,063
Surrender of shares in connection with restricted stock vesting	(61)	(47)		(61)	(218)
Stock-based compensation	2,283	2,338		4,541	4,774
Ending Balance	0	0		0	0
Accumulated Deficit
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	(712,221)	(580,581)		(678,464)	(542,169)
Net income	25,774	39,307		22,543	54,260
Distributions and dividends on common stock	22,644	(56,512)		(5,619)	(113,024)
Other	80			80
Ending Balance	(663,723)	(598,491)		(663,723)	(598,491)
Accumulated Other Comprehensive Loss
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	(21,586)	(24,098)		(21,808)	(19,982)
Total other comprehensive income	757	605		979	1,186
Ending Balance	(20,829)	(23,493)		(20,829)	(23,493)
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)		7,047,695	[1]		7,047,695	[2]
Effect of stock dividend		$ 705	[1]		$ 705	[2]
2019 Stock Dividend | Accumulated Deficit
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Effect of stock dividend		$ (705)	[1]		$ (705)	[2]

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

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