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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES – Adoption of ASU 2017-07 (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2018 | Mar. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Cost of sales | $ 455,822 | $ 384,684
Selling, research & development and administrative | 112,461 | 101,282
Total Operating Expenses | 615,394 | 523,297
Operating Income | 87,956 | 78,019
Miscellaneous, net | (867) | (559)
Total Other (Expense) Income | (6,739) | (8,539)
Income before Income Taxes | $ 81,217 | 69,480
Original Balance | Accounting Standards Update 2017-07 |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Cost of sales |  | 384,932
Selling, research & development and administrative |  | 101,516
Total Operating Expenses |  | 523,779
Operating Income |  | 77,537
Miscellaneous, net |  | (77)
Total Other (Expense) Income |  | (8,057)
Income before Income Taxes |  | 69,480
Adjustment | Accounting Standards Update 2017-07 |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Cost of sales |  | (248)
Selling, research & development and administrative |  | (234)
Total Operating Expenses |  | (482)
Operating Income |  | 482
Miscellaneous, net |  | (482)
Total Other (Expense) Income |  | $ (482)

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