Commitments and Contingencies - Additional Information (Detail) - USD ($)	1 Months Ended	12 Months Ended
	Nov. 30, 2015	Dec. 31, 2016
Telecommunication Services [Member]
Commitments Contingencies And Litigation [Line Items]
Litigation settlement, Gross		$ 71,000,000
Information Technology [Member]
Commitments Contingencies And Litigation [Line Items]
Litigation settlement, Gross		71,000,000
Standby Letters of Credit [Member]
Commitments Contingencies And Litigation [Line Items]
Amount withdrawn from standby letter of credit		24,600,000
Revolving Credit Facility [Member]
Commitments Contingencies And Litigation [Line Items]
Amount withdrawn from standby letter of credit		$ 1,500,000
Purchase Commitments [Member]
Commitments Contingencies And Litigation [Line Items]
Contractual obligation related with telecommunication		5 years
Purchase of advertising		$ 265,400,000
Miami, Florida [Member]
Commitments Contingencies And Litigation [Line Items]
Initial term of future operating lease	15 years
First option renewal term	5 years
Second option renewal term	5 years
Future lease expense due in 2018	$ 1,800,000
Future lease expense in final year	$ 4,900,000