Taxes - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Taxes [Line Items]
(Provision for) benefit from income taxes	$ 10,346	$ (744)	$ (10,948)
Percentage prohibited transaction tax for not meeting the requirements of statutory relief	100.00%
Federal
Income Taxes [Line Items]
Estimated operating loss carry forwards	$ 70,000
Net Operating Loss carry forwards	97,000
Net Operating Loss carry forwards, expiring year		2028
Federal | Minimum
Income Taxes [Line Items]
Net Operating Loss carry forwards, expiring year		2030
Federal | Maximum
Income Taxes [Line Items]
Net Operating Loss carry forwards, expiring year		2035
State and Local Jurisdiction
Income Taxes [Line Items]
Net Operating Loss carry forwards	$ 1,300,000