Property and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 38,110	$ 26,309
Accumulated depreciation	(13,670)	(7,788)
Property and equipment	24,440	18,521
Depreciation and amortization	6,847	4,083	$ 2,971
Fixed Assets [Member]
Property, Plant and Equipment [Line Items]
Depreciation and amortization	5,500	4,000	$ 2,900
Computer hardware and equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	19,515	13,370
Purchased software and licenses [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	6,994	5,759
Furniture and fixtures [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	4,211	3,116
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	7,390	4,064
Assets Held under Capital Leases [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	$ 3,100	$ 3,200