CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Total Stockholders' Equity	Non-Controlling Interests
Balance (in shares) at Dec. 31, 2013		28,506,977
Balance at Dec. 31, 2013	$ 406,216	$ 284	$ 419,405	$ (13,473)	$ 406,216
Increase (Decrease) in Stockholders' Equity
Stock-based compensation (in shares)		79,938
Stock‑based compensation	939		939		939
Net income	24,616			24,396	24,396	$ 220
Dividends declared	(28,597)			(28,597)	(28,597)
Contributions from non-controlling interests	77,712					77,712
Balance (in shares) at Dec. 31, 2014		28,586,915
Balance at Dec. 31, 2014	480,886	$ 284	420,344	(17,674)	402,954	77,932
Increase (Decrease) in Stockholders' Equity
Stock-based compensation (in shares)		22,735
Stock‑based compensation	835		835		835
Net income	43,320			34,285	34,285	9,035
Dividends declared	(28,603)			(28,603)	(28,603)
Contributions from non-controlling interests	5,685					5,685
Distributions to non-controlling interests	$ (45,635)					(45,635)
Balance (in shares) at Dec. 31, 2015	28,609,650	28,609,650
Balance at Dec. 31, 2015	$ 456,488	$ 284	421,179	(11,992)	409,471	47,017
Increase (Decrease) in Stockholders' Equity
Stock-based compensation (in shares)		3,022
Stock‑based compensation	$ 312		312		312
Stock repurchased and retired during period, shares	(129,916)	(129,916,000)
Stock repurchased and retired during period, value	$ (1,436)	$ (1)	(1,435)		(1,436)
Net income	44,868			40,336	40,336	4,532
Dividends declared	(29,654)			(29,654)	(29,654)
Contributions from non-controlling interests	11					11
Distributions to non-controlling interests	$ (40,916)					(40,916)
Balance (in shares) at Dec. 31, 2016	28,482,756	28,482,756
Balance at Dec. 31, 2016	$ 429,673	$ 283	$ 420,056	$ (1,310)	$ 419,029	$ 10,644