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GOODWILL AND INTANGIBLE ASSETS (Narrative) (Details) (USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Goodwill [Line Items] |  |  |  |  |  |  |  |  |  |  |
Goodwill | $ 57,417,000 us-gaap_Goodwill |  |  |  | $ 22,268,000 us-gaap_Goodwill |  |  |  | $ 57,417,000 us-gaap_Goodwill | $ 22,268,000 us-gaap_Goodwill | $ 22,698,000 us-gaap_Goodwill
Goodwill impairment loss | 2,241,000 us-gaap_GoodwillImpairmentLoss | 0 us-gaap_GoodwillImpairmentLoss | 0 us-gaap_GoodwillImpairmentLoss | 0 us-gaap_GoodwillImpairmentLoss | 0 us-gaap_GoodwillImpairmentLoss | 0 us-gaap_GoodwillImpairmentLoss | 0 us-gaap_GoodwillImpairmentLoss | 0 us-gaap_GoodwillImpairmentLoss | 2,241,000 us-gaap_GoodwillImpairmentLoss | 0 us-gaap_GoodwillImpairmentLoss | 0 us-gaap_GoodwillImpairmentLoss
North America |  |  |  |  |  |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |  |  |  |  |  |
Goodwill | 31,078,000 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = us-gaap_NorthAmericaMember |  |  |  | 16,438,000 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = us-gaap_NorthAmericaMember |  |  |  | 31,078,000 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = us-gaap_NorthAmericaMember | 16,438,000 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = us-gaap_NorthAmericaMember | 16,643,000 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = us-gaap_NorthAmericaMember
Goodwill impairment loss |  |  |  |  |  |  |  |  | 0 us-gaap_GoodwillImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = us-gaap_NorthAmericaMember |  |
Accumulated impairment loss | 0 us-gaap_GoodwillImpairedAccumulatedImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = us-gaap_NorthAmericaMember |  |  |  | 0 us-gaap_GoodwillImpairedAccumulatedImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = us-gaap_NorthAmericaMember |  |  |  | 0 us-gaap_GoodwillImpairedAccumulatedImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = us-gaap_NorthAmericaMember | 0 us-gaap_GoodwillImpairedAccumulatedImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = us-gaap_NorthAmericaMember | 0 us-gaap_GoodwillImpairedAccumulatedImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = us-gaap_NorthAmericaMember
Europe |  |  |  |  |  |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |  |  |  |  |  |
Goodwill | 26,339,000 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = us-gaap_EuropeMember |  |  |  | 2,864,000 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = us-gaap_EuropeMember |  |  |  | 26,339,000 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = us-gaap_EuropeMember | 2,864,000 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = us-gaap_EuropeMember | 2,864,000 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = us-gaap_EuropeMember
Goodwill impairment loss |  |  |  |  |  |  |  |  | 0 us-gaap_GoodwillImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = us-gaap_EuropeMember |  |
Accumulated impairment loss | 0 us-gaap_GoodwillImpairedAccumulatedImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = us-gaap_EuropeMember |  |  |  | 0 us-gaap_GoodwillImpairedAccumulatedImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = us-gaap_EuropeMember |  |  |  | 0 us-gaap_GoodwillImpairedAccumulatedImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = us-gaap_EuropeMember | 0 us-gaap_GoodwillImpairedAccumulatedImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = us-gaap_EuropeMember | 0 us-gaap_GoodwillImpairedAccumulatedImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = us-gaap_EuropeMember
Russia |  |  |  |  |  |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |  |  |  |  |  |
Goodwill | 0 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = country_RU |  |  |  | 2,966,000 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = country_RU |  |  |  | 0 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = country_RU | 2,966,000 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = country_RU | 3,191,000 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = country_RU
Goodwill impairment loss |  |  |  |  |  |  |  |  | 2,241,000 us-gaap_GoodwillImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = country_RU |  |
Other |  |  |  |  |  |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |  |  |  |  |  |
Goodwill | 0 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember |  |  |  | 0 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember |  |  |  | 0 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 0 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 0 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Accumulated impairment loss | $ 1,697,000 us-gaap_GoodwillImpairedAccumulatedImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember |  |  |  |  |  |  |  | $ 1,697,000 us-gaap_GoodwillImpairedAccumulatedImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember |  |

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