Property, Plant and Equipment - Schedule of Property, Plant and Equipment and Accumulated Depreciation (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Property plant and equipment, gross	$ 50,495	$ 33,848
Less: accumulated depreciation	(14,130)	(11,540)
Property, plant and equipment, net	45,358	38,671
Buildings [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment, gross	27,190	14,828
Software and capitalized software costs [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment, gross	6,689	5,578
Computer equipment [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment, gross	6,241	4,832
Rental clocks [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment, gross	5,743	4,865
Furniture, fixtures and equipment [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment, gross	4,052	3,189
Vehicles [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment, gross	421	421
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment, gross	159	135
Excluded Land and Construction in process [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	36,365	22,308
Land [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	8,993	8,993
Construction in process [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net		$ 7,370