Revenue Recognition - Additional Information (Detail 1)	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Minimum | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2018-01-01
Revenue Recognition [Line Items]
Performance obligations, customer satisfaction period			1 month
Minimum | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2019-01-01
Revenue Recognition [Line Items]
Performance obligations, customer satisfaction period		2 months
Minimum | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2020-01-01
Revenue Recognition [Line Items]
Performance obligations, customer satisfaction period	3 months
Maximum | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2018-01-01
Revenue Recognition [Line Items]
Performance obligations, customer satisfaction period			23 months
Maximum | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2019-01-01
Revenue Recognition [Line Items]
Performance obligations, customer satisfaction period		22 months
Maximum | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2020-01-01
Revenue Recognition [Line Items]
Performance obligations, customer satisfaction period	12 months