Summary of Quarterly Results (unaudited) - Summary of Quarterly Results of Operations (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
Quarterly Financial Data [Abstract]
Revenues	$ 66,135	$ 166,802	$ 171,318	$ 172,303	$ 172,918	$ 170,528	$ 167,726	$ 162,928	$ 161,226	$ 683,341	$ 662,408
Net (loss) income attributable to the common stockholders	$ 57,308	$ (6,489)	$ (139)	$ 3,188	$ (6,494)	$ 8,905	$ 1,116	$ (4,709)	$ (9,731)	$ (9,934)	$ (4,419)
Income (Loss) Per Common Share Basic	$ 0.27	$ (0.03)	$ 0.00	$ 0.01	$ (0.03)	$ 0.04	$ 0.01	$ (0.02)	$ (0.05)	$ (0.05)	$ (0.02)
Income (Loss) Per Common Share Diluted	$ 0.27	$ (0.03)	$ 0.00	$ 0.01	$ (0.03)	$ 0.04	$ 0.01	$ (0.02)	$ (0.05)	$ (0.05)	$ (0.02)