Annual report pursuant to Section 13 and 15(d)

Income Taxes - Additional Information (Details)

v3.8.0.1
Income Taxes - Additional Information (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 30, 2017
Dec. 31, 2016
Jan. 02, 2016
Tax Credit Carryforward [Line Items]      
Effective tax rate (710.00%) 5.50% (179.60%)
Annual usage limitation $ 135    
Valuation allowance 6,309 $ 43,877  
Deferred tax asset valuation allowance decrease 32,153    
Tax Cuts and Jobs Act of 2017, change in tax rate, decrease in deferred tax assets 13,630    
Tax Cuts and Jobs Act of 2017, change in tax rate, decrease in deferred tax liabilities 1,459    
Tax Cuts and Jobs Act of 2017, change in tax rate, decrease in deferred tax asset valuation allowance 1,494    
Tax Cuts and Jobs Act of 2017, change in tax rate, tax expense 10,677    
Foreign earnings repatriated 1,123    
Accrued expenses related to income taxes payable 3 35  
Federal      
Tax Credit Carryforward [Line Items]      
Net operating loss carryforwards 67,492    
State      
Tax Credit Carryforward [Line Items]      
Net operating loss carryforwards 72,092    
Whitney Automotive Group (WAG) | Federal      
Tax Credit Carryforward [Line Items]      
Net operating loss carryforwards 2,475    
Other non-current liabilities | Foreign Tax Authority      
Tax Credit Carryforward [Line Items]      
Income taxes payable $ 601 $ 525