Quarterly report pursuant to Section 13 or 15(d)

Significant Classes of Amortizable Intangible Assets by Major Category (Detail)

v2.4.0.8
Significant Classes of Amortizable Intangible Assets by Major Category (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]    
Cost $ 46,439 $ 36,726
Accumulated Amortization (29,542) (27,933)
Net 16,897 8,793
Customer lists and contracts
    
Finite-Lived Intangible Assets [Line Items]    
Cost 19,911 17,170
Accumulated Amortization (14,539) (13,830)
Net 5,372 3,340
Domain and brand names
    
Finite-Lived Intangible Assets [Line Items]    
Cost 15,399 12,700
Accumulated Amortization (8,520) (8,124)
Net 6,879 4,576
Favorable and assigned leases
    
Finite-Lived Intangible Assets [Line Items]    
Cost 2,358 2,358
Accumulated Amortization (1,726) (1,701)
Net 632 657
Subscriber base and lists
    
Finite-Lived Intangible Assets [Line Items]    
Cost 4,302 1,856
Accumulated Amortization (2,060) (1,856)
Net 2,242  
Author relationships
    
Finite-Lived Intangible Assets [Line Items]    
Cost 2,245 563
Accumulated Amortization (767) (563)
Net 1,478  
Non-compete agreements
    
Finite-Lived Intangible Assets [Line Items]    
Cost 888 743
Accumulated Amortization (564) (550)
Net 294 193
Other amortizable intangible assets
    
Finite-Lived Intangible Assets [Line Items]    
Cost 1,336 1,336
Accumulated Amortization (1,336) (1,309)
Net   $ 27