Impairment Loss (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Goodwill impairment	$ 0	$ 0
Impairment loss		8,911,000	$ 28,243,000
Deferred tax benefit	$ (6,239,000)	17,268,000	3,359,000
EquipmentOne [Member]
Property, Plant and Equipment [Line Items]
Goodwill impairment			23,574,000
Deferred tax benefit		1,798,000
Technology [Member]
Property, Plant and Equipment [Line Items]
Impairment loss		8,911,000
Customer Relationships [Member] | EquipmentOne [Member]
Property, Plant and Equipment [Line Items]
Impairment loss		$ 8,911,000	$ 4,669,000