Condensed Consolidated Statements of Stockholders' Deficiency - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018		Sep. 30, 2019	Sep. 30, 2018
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance (in shares)				140,914,642
Beginning Balance	$ (606,696)	$ (428,719)		$ (547,366)	$ (331,760)
Impact of adoption of new accounting standards				(1,550)	(12,857)
Net income	36,008	15,028		90,348	37,688
Total other comprehensive income	344	318		1,530	887
Distributions and dividends on common stock	(58,724)	(55,844)		(176,298)	(167,656)
Restricted stock grant				0	0
Surrender of shares in connection with restricted stock vesting	(1,953)	(3,656)		(2,174)	(3,656)
Effect of stock dividend		0		0
Stock-based compensation	$ 2,348	2,585		7,122	7,425
Distributions to non-controlling interest		(2,162)		$ (285)	(2,521)
Ending Balance (in shares)	147,790,061			147,790,061
Ending Balance	$ (628,673)	$ (472,450)		$ (628,673)	$ (472,450)
Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance (in shares)	140,953,900	134,397,090		140,914,642	134,365,424
Beginning Balance	$ 14,095	$ 13,440		$ 14,092	$ 13,437
Restricted stock grant (in shares)				60,000	31,666
Restricted stock grant				$ 6	$ 3
Surrender of shares in connection with restricted stock vesting (in shares)	(200,926)	(192,119)		(221,668)	(192,119)
Surrender of shares in connection with restricted stock vesting	$ (19)	$ (19)		$ (22)	$ (19)
Effect of stock dividend (in shares)		7,037,087		7,037,087
Effect of stock dividend		$ 703		$ 703
Ending Balance (in shares)	147,790,061	147,960,374		147,790,061	147,960,374
Ending Balance	$ 14,779	$ 14,797		$ 14,779	$ 14,797
Additional Paid-in Capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	0	0		0	0
Distributions and dividends on common stock	(414)	1,052		(4,964)	(3,785)
Restricted stock grant				(6)	(3)
Surrender of shares in connection with restricted stock vesting	(1,934)	(3,637)		(2,152)	(3,637)
Stock-based compensation	2,348	2,585		7,122	7,425
Ending Balance	0	0		0	0
Accumulated Deficit
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	(597,786)	(495,637)		(542,169)	(414,785)
Impact of adoption of new accounting standards				3,147	1,094
Net income	36,008	12,002		90,268	37,031
Distributions and dividends on common stock	(58,310)	(56,896)		(171,334)	(163,871)
Effect of stock dividend		(703)		(703)
Ending Balance	(620,791)	(541,907)		(620,791)	(541,907)
AOCI Attributable to Parent
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	(23,493)	(18,038)		(19,982)	(12,571)
Impact of adoption of new accounting standards				(4,697)	(6,036)
Total other comprehensive income	344	318		1,530	887
Ending Balance	(23,149)	(17,720)		(23,149)	(17,720)
Non-controlling Interest
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	488	71,516		693	82,159
Impact of adoption of new accounting standards					(7,915)
Net income		3,026		80	657
Distributions to non-controlling interest		(2,162)		(285)	(2,521)
Ending Balance	$ 488	72,380		$ 488	72,380
September 27, 2018 Dividend
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Effect of stock dividend		$ 0	[1]		$ 0	[2]
September 27, 2018 Dividend | Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Effect of stock dividend (in shares)		6,709,671	[1]		6,709,671	[2]
Effect of stock dividend		$ 671	[1]		$ 671	[2]
September 27, 2018 Dividend | Accumulated Deficit
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Effect of stock dividend		(671)	[1]		(671)	[2]
September 27, 2019 Dividend
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Effect of stock dividend		$ 0	[1]		$ 0	[2]
September 27, 2019 Dividend | Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Effect of stock dividend (in shares)		7,045,732	[1]		7,045,732	[2]
Effect of stock dividend		$ 705	[1]		$ 705	[2]
September 27, 2019 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 and September 27, 2018 stock dividends on the third quarter 2018 common-stock activity.

[2] Represents the effect of the September 27, 2019 and September 27, 2018 stock dividends on the third quarter 2018 common-stock activity.