Annual report pursuant to Section 13 and 15(d)

Income Taxes - Additional Information (Detail)

v3.8.0.1
Income Taxes - Additional Information (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2015
Dec. 31, 2016
Income Taxes Disclosure [Line Items]      
Tax cuts and job act of 2017, additional deferred tax expense $ 7,262    
Deferred tax expense related to reduction in future corporate tax rates and changes in methods of apportioning income   $ 1,694  
Net deferred tax assets 11,612   $ 19,989
Net tax receivable     2,625
Net tax payables 701    
Net Deferred tax liabilities relating to non-controlling interests $ 92   95
Income tax settlement The amount recognized is measured as the largest amount of benefit that is greater than 50% likely of being realized upon ultimate settlement.    
Federal      
Income Taxes Disclosure [Line Items]      
Net tax receivable     1,427
Net tax payables $ 662    
State and Local Jurisdiction      
Income Taxes Disclosure [Line Items]      
Net tax receivable     $ 1,198
Net tax payables $ 39