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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Accumulated Other Comprehensive Income (Details) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 USD ($) entity | Dec. 31, 2016 USD ($) entity
Changes in AOCI, including the amounts reclassified to income |  |
Balance | $ 82,741 | $ 83,777
Balance | $ 90,992 | $ 82,741
Number of entities liquidated | entity | 1 | 2
Net loss from the cumulative translation adjustment | $ 1,700 | $ 100
AOCI Including Portion Attributable to Noncontrolling Interest |  |
Changes in AOCI, including the amounts reclassified to income |  |
Balance | 62,002 | 61,470
Balance | 62,411 | 62,002
Foreign currency translation |  |
Changes in AOCI, including the amounts reclassified to income |  |
Gain recorded in other comprehensive income | 2,112 | 570
Unrealized gains (losses), net of tax |  |
Changes in AOCI, including the amounts reclassified to income |  |
Gain reclassified from AOCI to income | (1,703) | $ (38)
AOCI Attributable to Noncontrolling Interest |  |
Changes in AOCI, including the amounts reclassified to income |  |
Balance | $ 0 |

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- Definition The increase (decrease) in cumulative translation adjustment before transfers included in determining net income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 45 -Paragraph 20 -Subparagraph (b),(c) -URI http://asc.fasb.org/extlink&oid=64808268&loc=d3e32211-110900 + Details
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- Definition Amount after tax, before reclassification adjustments of other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 55 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=66004921&loc=d3e1436-108581 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=66004124&loc=SL7669686-108580 + Details
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- Definition Amount after tax of reclassification adjustments of other comprehensive income (loss) attributable to parent. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=66004124&loc=SL7669686-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 55 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=66004921&loc=d3e1436-108581 + Details
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