Consolidated Balance Sheets (Parenthetical) - $ / shares	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, 2014
Statement of Financial Position [Abstract]
Common stock, shares outstanding (in shares)	135,966,013				86,864,063
Common stock, par value (in dollars per share)	$ 0.01				$ 0.01
Common stock, shares authorized (in shares)	500,000,000				500,000,000
Common stock, shares issued (in shares)	135,966,013				86,864,063
Partners' Capital, Number of Units, Par Value and Other Disclosures [Abstract]
General Partner units issued (in units)	135,966,013	134,620,300	134,337,589	108,379,324	86,864,063	71,040,502	70,955,331	69,943,001	50,640,863
General Partner units outstanding (in units)	135,966,013	134,620,300	134,337,589	108,379,324	86,864,063	71,040,502	70,955,331	69,943,001	50,640,863
Limited Partner units issued (in units)	3,436,207	3,618,988	3,894,249	3,905,763	3,879,115	3,842,763	3,848,950	3,640,900	3,190,339
Limited Partner units outstanding (in units)	3,436,207	3,618,988	3,894,249	3,905,763	3,879,115	3,842,763	3,848,950	3,640,900	3,190,339