Property and Equipment - Schedule of Property and Equipment and Accumulated Depreciation and Amortization (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Property and Equipment [Line Items]
Property and equipment, gross	$ 397,790	$ 380,462
Less: accumulated depreciation and amortization	(192,786)	(178,111)
Property and equipment, net	301,579	285,218
Software and Capitalized Software Costs [Member]
Property and Equipment [Line Items]
Property and equipment, gross	156,664	144,190
Buildings [Member]
Property and Equipment [Line Items]
Property and equipment, gross	115,792	115,772
Computer Equipment [Member]
Property and Equipment [Line Items]
Property and equipment, gross	71,749	68,181
Rental Clocks [Member]
Property and Equipment [Line Items]
Property and equipment, gross	26,544	25,474
Furniture, Fixtures and Equipment [Member]
Property and Equipment [Line Items]
Property and equipment, gross	19,963	19,829
Other [Member]
Property and Equipment [Line Items]
Property and equipment, gross	7,078	7,016
Property and Equipment, net, Excluding Land and Construction in Progress [Member]
Property and Equipment [Line Items]
Property and equipment, net	205,004	202,351
Construction in Progress [Member]
Property and Equipment [Line Items]
Property and equipment, net	67,541	53,833
Land [Member]
Property and Equipment [Line Items]
Property and equipment, net	$ 29,034	$ 29,034