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Income Taxes - Summary of Differences Between Total Income Tax Expense Statutory Federal Income Tax Rate (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Income Tax Expense Benefit [Line Items]      
Other $ (1,020) $ (17,242) $ (8,409)
TRS [Member]      
Income Tax Expense Benefit [Line Items]      
Statutory Rate 21.00% 21.00% 34.00%
Statutory rate applied to pre-tax income $ 1,524 $ 393 $ 3,801
State tax expense net of federal income tax 27 0 254
Deferred tax expense net of federal income tax 0 0 724
AMT benefit refund 0 (430) 0
Permanent items 0 0 (241)
Deferred tax impact of tax rate change (89) 7,350 19,391
Valuation allowance decrease (increase) based on impact of tax rate change 89 (7,350) (23,470)
Valuation allowance decrease – other deferred (1,608) (672) 0
Other 91 279 0
Total expense (benefit) $ 34 $ (430) $ 459
Effective tax rate 0.47% (22.97%) 4.11%