Summary of Quarterly Financial Information (unaudited) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended											9 Months Ended	12 Months Ended
	Dec. 31, 2014		Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Dec. 31, 2013		Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Oct. 06, 2013	Dec. 31, 2014	Dec. 31, 2012
Quarterly Financial Information Disclosure [Abstract]
Revenues	$ 170,411	[1]	$ 169,441	$ 155,168	$ 140,306	$ 127,583	$ 149,388	[1]	$ 62,278	$ 59,569	$ 62,420	$ 206,072	$ 635,326	$ 260,294
Operating income	31,282		43,412	42,539	24,088	(117,110)						53,553	141,321	88,689
Net income	10,964		22,734	25,281	11,231	193,431	148,917	[1]	2,281	3,071	1,930	(37,232)	70,210	48,643
Net income attributable to non-controlling interests						(118,186)	(118,186)	[1]					(43,067)
Net income attributable to common stockholders	$ 4,142		$ 8,322	$ 9,834	$ 4,369		$ 30,731	[1]
Basic and diluted net income per share attributable to common stockholders	$ 0.04		$ 0.09	$ 0.10	$ 0.05	$ 0.79	$ 0.79	[1]					$ 0.27

[1] The results of operations of our predecessor for October 1, 2013 through October 6, 2013 and the results of operations of our company for October 7, 2013 through December 31, 2013 have been combined.