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LEASE ASSETS AND LIABILITIES (Details) - USD ($) $ in Thousands | Mar. 31, 2019 | Jan. 01, 2019
--- | --- | ---
ASSETS. |  |
Operating lease assets | $ 135,193 | $ 129,894
Operating Lease Assets Balance Sheet Location | us-gaap:OperatingLeaseRightOfUseAsset | us-gaap:OperatingLeaseRightOfUseAsset
Finance lease assets | $ 19,245 | $ 18,261
Total leased assets | 154,438 | 148,155
Current |  |
Operating Lease, Liability, Current | $ 37,660 | $ 35,535
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] | Operating Lease, Liability, Current | Operating Lease, Liability, Current
Finance Lease, Liability, Current | $ 7,730 | $ 8,770
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List] | Other current liabilities | Other current liabilities
Non-current |  |
Operating Lease, Liability, Noncurrent | $ 114,350 | $ 112,754
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] | Operating Lease, Liability, Noncurrent | Operating Lease, Liability, Noncurrent
Finance Lease, Liability, Noncurrent | $ 10,609 | $ 10,765
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] | Other liabilities, noncurrent | Other liabilities, noncurrent
Total lease liabilities | $ 170,349 | $ 167,824
Finance lease assets [Member] |  |
Current |  |
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List] | Property, plant and equipment, net | Property, plant and equipment, net

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- Definition Present value of lessee's discounted obligation for lease payments from finance lease, classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977 + Details
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- Definition Present value of lessee's discounted obligation for lease payments from finance lease, classified as noncurrent. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977 + Details
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- Definition Amount of lessee's right to use underlying asset under finance lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977 + Details
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- Definition Present value of lessee's discounted obligation for lease payments from operating lease, classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977 + Details
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