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OVERVIEW AND BASIS OF PRESENTATION (NARRATIVE) (DETAILS) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
UNUSUAL OR INFREQUENT ITEM [Line Items] |  |  |  |  |  |  |  |  |  |  |
Tax Adjustments, Settlements, and Unusual Provisions | $ 300 |  |  |  |  |  |  |  |  |  |
Tax Authorities Member |  |  |  |  |  |  |  |  |  |  |
UNUSUAL OR INFREQUENT ITEM [Line Items] |  |  |  |  |  |  |  |  |  |  |
Tax Adjustments, Settlements, and Unusual Provisions |  |  |  |  | $ 1,100 |  | $ 301 | $ 358 | $ 137 | $ 123 | $ 180
Sofica [Member] |  |  |  |  |  |  |  |  |  |  |
UNUSUAL OR INFREQUENT ITEM [Line Items] |  |  |  |  |  |  |  |  |  |  |
Other comprehensive income before reclassifications - foreign currency translation adjustment |  |  |  | $ 3,200 | 1,500 |  |  | 1,700 |  |  |
Philippines pension liability [Member] |  |  |  |  |  |  |  |  |  |  |
UNUSUAL OR INFREQUENT ITEM [Line Items] |  |  |  |  |  |  |  |  |  |  |
Other, net of tax |  |  |  |  | 2,700 |  |  |  |  |  |
Government Authorities [Member] |  |  |  |  |  |  |  |  |  |  |
UNUSUAL OR INFREQUENT ITEM [Line Items] |  |  |  |  |  |  |  |  |  |  |
Tax Adjustments, Settlements, and Unusual Provisions |  |  |  | $ 1,750 | $ 234 |  |  | $ 645 | $ 406 | $ 466 |
WebMetro [Member] |  |  |  |  |  |  |  |  |  |  |
UNUSUAL OR INFREQUENT ITEM [Line Items] |  |  |  |  |  |  |  |  |  |  |
Impairment losses |  | $ 2,900 | $ 600 |  |  | $ 2,300 |  |  |  |  |

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