Quarterly report pursuant to Section 13 or 15(d)

Income Taxes - Additional Information (Detail)

v3.10.0.1
Income Taxes - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Jan. 01, 2018
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]            
Provision (benefit) for income taxes for continuing operations   $ 6,255 $ 9,890 $ 17,880 $ 27,576  
Effective income tax rate   28.00% 39.90% 27.80% 39.00%  
Valuation allowance   $ 2,800   $ 2,800   $ 2,800
Net deferred tax asset   36,200   36,200   32,500
Net current tax asset   $ 3,000   $ 3,000   $ 5,800
ASU 2018-02 [Member]            
New Accounting Pronouncements or Change in Accounting Principle [Line Items]            
Impact on retained earnings of adopting recent accounting pronouncement $ 399