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INCOME TAXES (Details 3) (USD $)
 3 Months Ended 12 Months Ended
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Current:                      
United States-Federal                 $ 1,703,000 $ 4,812,000 $ (13,243,000)
United States-State                 895,000 2,418,000 394,000
Foreign                 11,787,000 11,099,000 12,721,000
Total current income tax expense (benefit)                 14,385,000 18,329,000 (128,000)
Deferred:                      
United States-Federal                 (5,273,000) 4,050,000 17,357,000
United States-State                 169,000 (1,011,000) (439,000)
Foreign                 255,000 (537,000) (2,170,000)
Total deferred income tax expense (benefit)                 (4,849,000) 2,502,000 14,748,000
Consolidated:                      
United States-Federal                 (3,570,000) 8,862,000 4,113,000
United States-State                 1,064,000 1,407,000 (44,000)
Foreign                 12,042,000 10,562,000 10,551,000
Income tax expense (1,758,000) 2,481,000 4,868,000 3,945,000 11,799,000 4,145,000 2,673,000 2,214,000 9,536,000 20,831,000 14,620,000
Deferred tax assets:                      
Receivables reserve 1,225,000       4,589,000       1,225,000 4,589,000  
Temporary differences not currently deductible for tax 6,690,000       12,540,000       6,690,000 12,540,000  
Deferred compensation 1,702,000       1,851,000       1,702,000 1,851,000  
Foreign tax credit carryforwards 13,575,000       15,395,000       13,575,000 15,395,000  
Interest rate swap         4,457,000         4,457,000  
Net operating losses 2,822,000       1,732,000       2,822,000 1,732,000  
Valuation allowance (16,312,000)       (16,788,000)       (16,312,000) (16,788,000)  
Total deferred tax asset 9,702,000       23,776,000       9,702,000 23,776,000  
Deferred tax liabilities:                      
Property, plant and equipment, net 23,866,000       58,521,000       23,866,000 58,521,000  
Intangible assets, net 11,245,000       38,034,000       11,245,000 38,034,000  
Market discount         2,280,000         2,280,000  
Pension 205,000       598,000       205,000 598,000  
Total deferred tax liabilities 35,316,000       99,433,000       35,316,000 99,433,000  
Net deferred tax liabilities 25,614,000       75,657,000       25,614,000 75,657,000  
Deferred tax assets:                      
Current 1,994,000       8,349,000       1,994,000 8,349,000  
Total deferred tax asset 1,994,000       8,349,000       1,994,000 8,349,000  
Deferred tax liabilities:                      
Current 1,601,000               1,601,000    
Long term 26,007,000       84,006,000       26,007,000 84,006,000  
Total deferred tax liabilities 27,608,000       84,006,000       27,608,000 84,006,000  
Net deferred tax liabilities 25,614,000       75,657,000       25,614,000 75,657,000  
State
                      
Operating loss carryforwards                      
Net operating loss carryforwards 1,200,000               1,200,000    
Foreign
                      
Operating loss carryforwards                      
Net operating loss carryforwards $ 1,600,000               $ 1,600,000