Consolidated Statements of Changes in Equity - USD ($) $ in Thousands	Total	Preferred Shares	Preferred Shares Paid-In Capital	Common Shares	Common Shares Paid-In Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit	Noncontrolling interests
Beginning balance (Predecessor Company) at Dec. 31, 2013	$ 2,527,734		$ 361,622		$ 2,953,495	$ (15,652)	$ (771,731)
Balance (in shares) (Predecessor Company) at Dec. 31, 2013		14,950,000		204,824,159.000
Increase (Decrease) in Shareholders' Equity
Net income (loss) | Predecessor Company	105,980						105,980
Other comprehensive income (loss) | Predecessor Company	(10,695)					(10,695)
Distributions declared on preferred shares | Predecessor Company	(6,891)						(6,891)
Distributions declared on common shares | Predecessor Company	(45,061)						(45,061)
Share-based compensation expense related to restricted common shares | Predecessor Company	1,018				1,018
Ending balance (Predecessor Company) at Apr. 30, 2014	2,572,085		361,622		2,954,513	(26,347)	(717,703)
Ending balance (Successor Company) at Apr. 30, 2014	2,572,085		361,622		2,954,513	(26,347)	(717,703)	$ 0
Balance (in shares) (Predecessor Company) at Apr. 30, 2014		14,950,000		204,824,159
Balance (in shares) (Successor Company) at Apr. 30, 2014		14,950,000		204,824,159
Increase (Decrease) in Shareholders' Equity
Purchase accounting adjustments | Successor Company	191,371		17,361		(570,040)	26,347	717,703
Ending balance (Successor Company) at May. 01, 2014	2,763,456		378,983		2,384,473	0	0	0
Balance (in shares) (Successor Company) at May. 01, 2014		14,950,000		204,824,159
Beginning balance (Predecessor Company) at Apr. 30, 2014	2,572,085		361,622		2,954,513	(26,347)	(717,703)
Beginning balance (Successor Company) at Apr. 30, 2014	2,572,085		361,622		2,954,513	(26,347)	(717,703)	0
Balance (in shares) (Predecessor Company) at Apr. 30, 2014		14,950,000		204,824,159
Balance (in shares) (Successor Company) at Apr. 30, 2014		14,950,000		204,824,159
Increase (Decrease) in Shareholders' Equity
Reverse stock split (in shares) | Successor Company				(204,824,059)
Capital contributions | Successor Company	106,125							106,125
Net income (loss) | Successor Company	(219,229)						(213,273)	(5,956)
Other comprehensive income (loss) | Successor Company	0
Distributions declared on preferred shares | Successor Company	(20,673)						(20,673)
Distributions to Parent | Successor Company	(617,080)						(617,080)
Contributions from Parent | Successor Company	474,844						474,844
Capital contributions from Parent | Successor Company	605				605
Ending balance (Successor Company) at Dec. 31, 2014	2,488,048		378,983		2,385,078	0	(376,182)	100,169
Balance (in shares) (Successor Company) at Dec. 31, 2014		14,950,000		100
Increase (Decrease) in Shareholders' Equity
Capital contributions | Successor Company	6,139							6,139
Net income (loss) | Successor Company	(334,675)						(311,246)	(23,429)
Other comprehensive income (loss) | Successor Company	0
Distributions declared on preferred shares | Successor Company	(27,564)						(27,564)
Distributions to Parent | Successor Company	(430,829)						(430,829)
Contributions from Parent | Successor Company	251,748						251,748
Ending balance (Successor Company) at Dec. 31, 2015	1,950,990		378,983		2,385,078	0	(895,950)	82,879
Ending balance at Dec. 31, 2015	1,950,990
Balance (in shares) (Successor Company) at Dec. 31, 2015		14,950,000		100
Increase (Decrease) in Shareholders' Equity
Cumulative effect adjustment from adoption of accounting guidance | Successor Company | Accounting Standards Update 2014-13	(1,877)						(1,877)
Capital contributions | Successor Company	8,085							8,085
Capital distributions | Successor Company	(7,609)							(7,609)
Net income (loss) | Successor Company	21,381						33,160	(11,779)
Other comprehensive income (loss) | Successor Company	0
Distributions declared on preferred shares | Successor Company	(27,564)						(27,564)
Distributions to Parent | Successor Company	(412,969)						(412,969)
Contributions from Parent | Successor Company	331,189						331,189
Ending balance (Successor Company) at Dec. 31, 2016	1,868,185		$ 378,983		$ 2,385,078	$ 0	(967,452)	$ 71,576
Ending balance at Dec. 31, 2016	1,868,185
Balance (in shares) (Successor Company) at Dec. 31, 2016		14,950,000		100
Increase (Decrease) in Shareholders' Equity
Cumulative effect adjustment from adoption of accounting guidance | Successor Company | Cumulative-Effect Adjustment of Deconsolidation of VIE	$ 4,682						$ 4,682