Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Income Tax Disclosure [Line Items]
(Provision) benefit for income taxes	$ (484,000)	$ (66,292,000)
Tax benefit related to the reversal of liabilities associated with unrecognized tax positions		6,700,000
Income tax expense related to current period operations		1,800,000
Company's reserve for uncertain tax benefits		12,400,000
Income Tax benefit		4,800,000
Reduction to the related accrued interest as an income tax benefit		2,100,000
Unrecognized tax benefits	0		0
REIT Conversion [Member]
Income Tax Disclosure [Line Items]
(Provision) benefit for income taxes		$ (61,300)