XML 111 R95.htm IDEA: XBRL DOCUMENT v3.8.0.1
Income Taxes - Additional Information (Detail) - USD ($)
 3 Months Ended 12 Months Ended
Dec. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Income Taxes [Line Items]          
Reconciliation of income taxes     35.00%    
Effective income tax rate impact related to nondeductible acquisition costs         $ 2,400,000
Tax Reform deferred tax impact of tax rate changes     $ 62,400,000    
Income taxes, estimated net benefit $ 25,700,000        
Tax reform deemed repatriation tax Impact     28,500,000    
Tax reform impact on earnings not permanently reinvested     8,200,000    
Unrecognized tax benefits that would impact effective tax rate 53,000,000   53,000,000    
Unrecognized tax expense (benefits), interest and penalty expense (benefit) recognized     2,000,000 $ 1,100,000 $ 1,000,000
Unrecognized tax benefits, accrued interest and penalties 11,800,000   11,800,000 11,000,000  
Deferred tax assets, net operating losses and other tax carryforwards 25,600,000   25,600,000 $ 39,700,000  
Deferred tax assets, net operating losses and other tax carryforwards 8,300,000   8,300,000    
Undistributed earnings of foreign subsidiaries 50,000,000   50,000,000    
Foreign and State Tax [Member]          
Income Taxes [Line Items]          
Income tax liability for foreign and state taxes     9,600,000    
Scenario, Forecast In the first quarter of 2014          
Income Taxes [Line Items]          
Reconciliation of income taxes   21.00%      
Minimum [Member]          
Income Taxes [Line Items]          
Reasonably possible decrease in unrecognized tax benefits 1,500,000   $ 1,500,000    
Deferred tax assets, remaining net operating losses and other tax carryforwards expiration period     2023    
Maximum [Member]          
Income Taxes [Line Items]          
Reasonably possible decrease in unrecognized tax benefits $ 21,500,000   $ 21,500,000