Annual report pursuant to Section 13 and 15(d)

Goodwill and Other Intangible Assets - Additional Information (Detail)

v3.8.0.1
Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($)
1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2016
Mar. 31, 2015
Dec. 31, 2016
Sep. 30, 2015
Sep. 30, 2015
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]                
Goodwill, impairment loss           $ 0 $ 0 $ 0
Amortization of finite-lived intangible assets           31,900,000 24,500,000 22,000,000
Impairment of identified intangible assets           0 750,000 $ 20,801,000
Indefinite-lived Intangible Assets, Transfers     $ 3,700,000     0 3,694,000  
Trade names                
Finite-Lived Intangible Assets [Line Items]                
Impairment of identified intangible assets $ 800,000 $ 500,000            
Indefinite-lived Intangible Assets, Transfers           $ 0 $ 2,212,000  
MyNewPlace | Trade names                
Finite-Lived Intangible Assets [Line Items]                
Estimated useful life of finite-lived intangible asset         7 years      
MyNewPlace | Trade names                
Finite-Lived Intangible Assets [Line Items]                
Impairment of identified intangible assets       $ 20,300,000