Annual report pursuant to Section 13 and 15(d)

New Accounting Pronouncements - Additional Information (Detail)

v3.10.0.1
New Accounting Pronouncements - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Jan. 01, 2019
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]        
Corporate income tax rate percent 21.00% 35.00%    
ASU 2016-15        
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]        
Reclassification of cash payments recorded in loss on debt amendments and refinancing from operating activities to financing activities   $ 521 $ 11,076  
Subsequent Event | Minimum | ASU 2016-02        
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]        
Operating leases, future minimum payments       $ 1,400,000
Subsequent Event | Maximum | ASU 2016-02        
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]        
Operating leases, future minimum payments       $ 1,700,000