GOODWILL AND INTANGIBLE ASSETS - Intangible Assets - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014
Intangible Assets
Intangible assets, net	$ 61,855	$ 7,447
Proprietary software technologies
Intangible Assets
Intangible assets, net	$ 0	$ 281
Maximum \| Proprietary software technologies
Intangible Assets
Useful life	10 years

Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

Name:	us-gaap_FiniteLivedIntangibleAssetsNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant