Revenue Recognition - Additional Information (Details)	12 Months Ended
	Dec. 31, 2018
Minimum
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Contract term	1 year
Maximum
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Contract term	7 years
Consumer Customers | Minimum
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Length of customer life	12 months
Consumer Customers | Maximum
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Length of customer life	60 months