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INCOME TAXES (Deferred) (Details) - USD ($)
$ in Thousands
 2 Months Ended 10 Months Ended 12 Months Ended
Feb. 28, 2017
Dec. 31, 2017
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Deferred tax assets:          
Accrued expenses   $ 36,843 $ 36,843 $ 53,366  
Pension liabilities   4,413 4,413 4,869  
Postretirement liabilities other than pensions   6,236 6,236 9,903  
Share-based compensation   4,466 4,466 7,119  
Federal and state net operating loss carryforwards   1,781 1,781 2,229  
Other   1,508 1,508 1,856  
Total deferred tax assets   55,247 55,247 79,342  
Valuation allowance   (844) (844) (293)  
Total deferred tax assets, net of valuation allowance   54,403 54,403 79,049  
Deferred tax liabilities:          
Amortization, depreciation, and basis differences for property, plant and equipment, and other long-lived assets   73,725 73,725 95,248  
Intangibles   14,573 14,573 24,715  
Revenue recognition   6,172 6,172 5,679  
Prepaid expenses   3,125 3,125 5,109  
Total deferred tax liabilities   97,595 97,595 130,751  
Net deferred tax liabilities   $ (43,192) $ (43,192) $ (51,702)  
Statutory federal rate (as a percent) 35.00% 32.74% 35.00% 35.00% 35.00%
Federal statutory tax rate used to calculate provisional effect of the Tax Reform Act in the period of enactment (as a percent)     21.00%