Property and Equipment - Schedule of Property and Equipment and Accumulated Depreciation and Amortization (Detail) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Property and Equipment [Line Items]
Property and equipment, gross	$ 418,858	$ 380,462
Less: accumulated depreciation and amortization	(208,424)	(178,111)
Property and equipment, net	320,997	285,218
Software and Capitalized Software Costs [Member]
Property and Equipment [Line Items]
Property and equipment, gross	170,635	144,190
Buildings [Member]
Property and Equipment [Line Items]
Property and equipment, gross	116,025	115,772
Computer Equipment [Member]
Property and Equipment [Line Items]
Property and equipment, gross	76,394	68,181
Rental Clocks [Member]
Property and Equipment [Line Items]
Property and equipment, gross	27,900	25,474
Furniture, Fixtures and Equipment [Member]
Property and Equipment [Line Items]
Property and equipment, gross	20,786	19,829
Other [Member]
Property and Equipment [Line Items]
Property and equipment, gross	7,118	7,016
Property and Equipment, net, Excluding Land and Construction in Progress [Member]
Property and Equipment [Line Items]
Property and equipment, net	210,434	202,351
Construction in Progress [Member]
Property and Equipment [Line Items]
Property and equipment, net	81,529	53,833
Land [Member]
Property and Equipment [Line Items]
Property and equipment, net	$ 29,034	$ 29,034