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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Revision of Prior Period Financial Statements) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |
Retirement and deferred compensation plan liabilities | $ (41,004) | $ (9,380) | $ (30,332)
Net Cash Provided by Operations | 324,729 | 325,299 | 323,759
Proceeds from stock option exercises | 73,905 | 55,347 | 64,759
Net Cash Provided (Used) by Financing Activities | $ 114,792 | (29,715) | (32,310)
As Previously Reported |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |
Retirement and deferred compensation plan liabilities |  | (7,486) | (29,576)
Net Cash Provided by Operations |  | 327,193 | 324,515
Proceeds from stock option exercises |  | 53,453 | 64,003
Net Cash Provided (Used) by Financing Activities |  | (31,609) | (33,066)
Adjustment |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |
Retirement and deferred compensation plan liabilities |  | (1,894) | (756)
Net Cash Provided by Operations |  | (1,894) | (756)
Proceeds from stock option exercises |  | 1,894 | 756
Net Cash Provided (Used) by Financing Activities |  | $ 1,894 | $ 756

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- Definition Amount of increase (decrease) in obligation for pension and other postretirement benefits. Includes, but is not limited to, defined benefit and defined contribution plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
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- Definition Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3521-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 26 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3574-108585 + Details
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- Definition Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3521-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3536-108585 + Details
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