Quarterly report pursuant to Section 13 or 15(d)

Amortizable Intangible Assets - Summary of Significant Classes of Amortizable Intangible Assets (Detail)

v3.19.1
Amortizable Intangible Assets - Summary of Significant Classes of Amortizable Intangible Assets (Detail) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]    
Cost $ 61,918 $ 64,444
Accumulated Amortization (52,279) (53,180)
Net 9,639 11,264
Customer Lists and Contracts [Member]    
Finite-Lived Intangible Assets [Line Items]    
Cost 23,456 24,673
Accumulated Amortization (20,896) (21,798)
Net 2,560 2,875
Domain and Brand Names [Member]    
Finite-Lived Intangible Assets [Line Items]    
Cost 20,236 21,358
Accumulated Amortization (16,434) (16,758)
Net 3,802 4,600
Favorable and Assigned Leases [Member]    
Finite-Lived Intangible Assets [Line Items]    
Cost 2,188 2,256
Accumulated Amortization (1,894) (1,953)
Net 294 303
Subscriber Base and Lists [Member]    
Finite-Lived Intangible Assets [Line Items]    
Cost 9,570 9,672
Accumulated Amortization (7,477) (7,198)
Net 2,093 2,474
Author Relationships [Member]    
Finite-Lived Intangible Assets [Line Items]    
Cost 2,771 2,771
Accumulated Amortization (2,493) (2,454)
Net 278 317
Non-Compete Agreements [Member]    
Finite-Lived Intangible Assets [Line Items]    
Cost 2,031 2,048
Accumulated Amortization (1,679) (1,641)
Net 352 407
Other Amortizable Intangible Assets [Member]    
Finite-Lived Intangible Assets [Line Items]    
Cost 1,666 1,666
Accumulated Amortization (1,406) (1,378)
Net $ 260 $ 288