INCOME TAXES - Foreign Tax Credits Carryforwards (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Tax Credit Carryforward [Line Items]
Foreign tax credits carryforwards	$ 1,481	$ 12,601
United States
Tax Credit Carryforward [Line Items]
Foreign tax credits carryforwards	100	11,604
Canada
Tax Credit Carryforward [Line Items]
Foreign tax credits carryforwards	654	641
United Kingdom
Tax Credit Carryforward [Line Items]
Foreign tax credits carryforwards	$ 727	$ 356

The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32559-109319

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Carryforwards
-URI http://asc.fasb.org/extlink&oid=6506874

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