PROPERTY, EQUIPMENT AND SOFTWARE, NET (Schedule of Property, Equipment and Software) (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Property, equipment and software, gross	$ 193,243	$ 168,865
Less accumulated depreciation	(98,895)	(76,425)
Property, equipment and software, net	94,348	92,440
Capitalized website and internal-use software development costs
Property, Plant and Equipment [Line Items]
Property, equipment and software, gross	77,327	61,515
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, equipment and software, gross	64,209	60,101
Computer equipment
Property, Plant and Equipment [Line Items]
Property, equipment and software, gross	31,504	28,551
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, equipment and software, gross	15,150	14,162
Telecommunication
Property, Plant and Equipment [Line Items]
Property, equipment and software, gross	3,852	3,457
Software
Property, Plant and Equipment [Line Items]
Property, equipment and software, gross	$ 1,201	$ 1,079

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

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