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INCOME TAXES - Income Tax Reconciliation (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Reconciliation from the tax computed at statutory income tax rates to the Company's income tax expense                      
Tax computed at statutory U.S. federal income tax rates                 $ 16,644 $ 15,782 $ 19,652
Non-controlling interest                 (2,887) (2,893) (2,807)
Foreign tax rate differential                 (6,621) (3,074) 1,659
Over (under) provided in prior periods                 (18) 1,069 652
Nondeductible expenses                 929 1,134 1,113
Goodwill Impairment                   2,622  
Capitalized transactions costs                 53 3,138  
Change in tax reserves                 4,433 2,561 2,564
State Taxes, net of federal benefit                 1,075 1,853 935
Change in valuation allowance                 6,137 (7,292) (5,949)
Foreign tax credit expiration                   4,179 6,396
Refund Claim for Domestic Production Deduction                 (3,382)    
Tax Cuts and Jobs Act of 2017                 (10,639)    
Capital loss                 (6,990)    
Other, net                 (75) 2,081 (78)
Total Income Tax Expense $ (6,181) $ (884) $ 2,596 $ 3,128 $ 3,982 $ 9,602 $ 2,945 $ 4,631 $ (1,341) $ 21,160 $ 24,137