XML 82 R70.htm IDEA: XBRL DOCUMENT v3.10.0.1
Income Taxes - Additional Information (Detail) - USD ($)
 1 Months Ended 5 Months Ended 6 Months Ended 12 Months Ended
Jul. 31, 2017
Dec. 31, 2017
Jun. 30, 2018
Dec. 31, 2018
Mar. 31, 2017
Income Tax [Line Items]          
Federal statutory tax rate   35.00% 21.00%    
Cancellation of indebtedness (COD) income $ 853,000,000        
Total amount of reduction of tax attributes 806,000,000        
Net operating losses and depreciable assets 518,000,000        
Attribute reduction in stock of foreign subsidiaries 288,000,000        
Excess COD income attributed to subsidiaries 37,000,000        
Deferred tax recognized on excess COD income 10,000,000        
Reduced in net operating loss carryforwards   $ 201,100,000      
Valuation allowance   43,218,000 $ 47,700,000   $ 2,300,000
Unrecognized deferred tax liability for temporary differences related to investments in foreign subsidiaries estimated amount   4,000,000      
Income tax penalties and interest   9,800,000      
Net impact in income loss   0 0    
Reduction in net deferred tax asset   27,300,000      
Recognized provisional deemed dividend   43,200,000      
Net deferred tax assets   43,200,000 47,700,000    
Adjustments to provisional amounts recorded     0    
One-time transition tax, adjustments to provisional amounts recorded     0    
Tax act, executive compensation, cap on deductibility, amount     $ 1,000,000    
Tax act, interest expense limitation, minimum percentage of adjusted taxable income     30.00%    
Estimate of interest expense limitation before consideration of valuation allowance     $ 7,500,000    
Scenario Plan          
Income Tax [Line Items]          
Federal statutory tax rate       21.00%  
Federal NOL          
Income Tax [Line Items]          
Net operating loss ("NOL") carryforwards   215,600,000     47,600,000
Foreign NOL          
Income Tax [Line Items]          
Tax credit   $ 2,300,000     $ 2,300,000
Tax credit year expire, start year   2026      
Tax credit year expire, end year   2027      
Domestic Subsidiaries          
Income Tax [Line Items]          
Excess COD income attributed to subsidiaries 47,000,000        
Deferred tax recognized on excess COD income $ 0        
Intercompany Vessel Sales          
Income Tax [Line Items]          
Remaining unamortized amount   $ 0