Revenue Recognition - Additional Information (Detail 1)	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Minimum | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2019-01-01
Revenue Recognition [Line Items]
Performance obligations, customer satisfaction period			1 month
Minimum | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2020-01-01
Revenue Recognition [Line Items]
Performance obligations, customer satisfaction period		1 month
Minimum | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2021-01-01
Revenue Recognition [Line Items]
Performance obligations, customer satisfaction period	1 month
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		22 months
Maximum | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2021-01-01
Revenue Recognition [Line Items]
Performance obligations, customer satisfaction period	22 months