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INCOME TAXES - Components of Deferred Tax Assets and Liabilities (FY) (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Deferred income tax assets: |  |
Accrued expenses and reserves | $ 10,961 | $ 26,117
Warranty reserve | 20,211 | 24,131
Deferred compensation/employee benefits | 18,353 | 25,755
Pension and postretirement obligations | 21,637 | 25,595
Inventory | 19,620 | 22,579
Net operating loss carry forwards | 65,671 | 59,416
Tax credit carry forwards | 1,921 | 621
Other | 13,053 | 2,317
Gross deferred income tax assets | 171,427 | 186,531
Valuation allowance | 25,683 | 21,418
Total deferred income tax assets | 145,744 | 165,113
Deferred income tax liabilities: |  |
Property, plant & equipment | 37,015 | 47,321
Intangibles | 288,141 | 359,312
Total deferred income tax liabilities | 325,156 | 406,633
Total deferred income tax liabilities | $ (179,412) | $ (241,520)

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