Income Taxes - Differences Between the Income Tax (Provision) Benefit Calculated at the Statutory U.S. Federal Income Tax Rate of 35% and the Actual Income Tax (Provision) Benefit Recorded for Continuing Operations (Detail) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Statutory federal income tax (provision) benefit										$ (34,774)	$ (43,750)	$ (9,035)
Adjustment for nontaxable income of the REIT										34,904	44,701	32,642
State taxes (net of federal tax benefit and change in valuation allowance)										(1,477)	950	3,216
Permanent items										(165)	(160)	1,092
Federal tax credits											112
Federal valuation allowance										8,271	(853)	(3,509)
Unrecognized tax benefits												6,261
REIT conversion												62,063
Effect of federal tax law change	$ 5,200									5,229
Other										(133)	467	(68)
Total benefit for income taxes		$ 8,430	$ 4,612	$ (866)	$ (321)	$ 1,096	$ 463	$ (576)	$ 484	$ 11,855	$ 1,467	$ 92,662