Income Taxes - Additional Information (Detail) - USD ($)	1 Months Ended	3 Months Ended									11 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, 2013	Nov. 30, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Line Items]
Effect of federal tax law change	$ 5,200,000											$ 5,229,000
Built-in-gains recognition period	5 years										10 years
U.S. federal statutory rate												35.00%
(Provision) benefit for income taxes		$ 8,430,000	$ 4,612,000	$ (866,000)	$ (321,000)	$ 1,096,000	$ 463,000	$ (576,000)	$ 484,000			$ 11,855,000	$ 1,467,000	$ 92,662,000
Deferred tax benefit	$ 153,464,000	153,464,000				156,320,000						153,464,000	156,320,000
Charitable contribution carryforwards	1,800,000	1,800,000										1,800,000
State net operating loss carryforwards	439,200,000	439,200,000										439,200,000
Company's reserve for unrecognized tax benefits														12,327,000
Income Tax benefit														5,500,000
Company's reserve for unrecognized tax benefits decreased														835,000
Interest expense on uncertain tax positions										$ (1,500,000)				(2,200,000)
Additional income tax benefit														500,000
Unrecognized tax benefits	0	0				0						0	0		$ 13,162,000
Penalty expense on uncertain tax positions														0
Interest on income taxes accrued related to uncertain tax positions	0	0				0						0	0
Income tax penalties accrued related to uncertain tax positions	0	0				$ 0						0	0
Charitable Contributions [Member]
Income Tax Disclosure [Line Items]
Deferred tax benefit	500,000	500,000										$ 500,000
Operating loss carryforwards expire date												2016
REIT Conversion [Member]
Income Tax Disclosure [Line Items]
(Provision) benefit for income taxes														64,800,000
Federal [Member]
Income Tax Disclosure [Line Items]
Federal net operating loss carryforwards	63,400,000	63,400,000										$ 63,400,000
Deferred tax benefit	22,200,000	22,200,000										$ 22,200,000
Operating loss carryforwards expire date												2032
Valuation allowances related to federal deferred tax assets												$ (8,300,000)	4,300,000	60,300,000
State [Member]
Income Tax Disclosure [Line Items]
Deferred tax benefit	$ 22,700,000	$ 22,700,000										22,700,000
Valuation allowances related to federal deferred tax assets												$ (1,800,000)	$ (3,500,000)	$ 19,000,000
State [Member] | Minimum [Member]
Income Tax Disclosure [Line Items]
Operating loss carryforwards expire date												2016
State [Member] | Maximum [Member]
Income Tax Disclosure [Line Items]
Operating loss carryforwards expire date												2035