Annual report pursuant to Section 13 and 15(d)

Goodwill and Other Intangible Assets - Additional Information (Detail)

v3.6.0.2
Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($)
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Mar. 31, 2015
Sep. 30, 2015
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]              
Goodwill, impairment loss         $ 0 $ 0 $ 0
Amortization of finite-lived intangible assets         24,500,000 22,000,000 20,700,000
Impairment of identified intangible assets         $ 750,000 $ 20,801,000 $ 0
Trade names              
Finite-Lived Intangible Assets [Line Items]              
Impairment of identified intangible assets $ 800,000   $ 500,000        
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