Income Taxes - Summary of Differences Between Total Income Tax Expense Statutory Federal Income Tax Rate (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Expense Benefit [Line Items]
Other	$ 2,625	$ 10,204	$ 14,745
Puerto Rico [Member]
Income Tax Expense Benefit [Line Items]
Statutory rate applied to pre-tax income (loss)			(4,306)
Valuation allowance (decrease) increase			4,194
Other			112
Total expense	0	$ 0	$ 0
Effective tax rate		12.00%	0.00%
TRS [Member]
Income Tax Expense Benefit [Line Items]
Statutory rate applied to pre-tax income (loss)	3,384	$ (492)	$ 4,115
Effect of state and local income taxes, net of federal tax benefit	498	(72)	605
Valuation allowance (decrease) increase	(4,039)	(1,169)	(6,144)
Other	174	1,733	1,424
Total expense	$ 17	$ 0	$ 0
Effective tax rate	0.17%	0.00%	0.00%