SEGMENT REPORTING (Details) (USD $)
3 Months Ended
Mar. 31, 2015
operating_segments
Mar. 31, 2014
Dec. 31, 2014
Dec. 31, 2013
Segment Reporting Information [Line Items]        
Number of business segments (in segments) 2      
Summarized information by operating segment [Abstract]        
Revenues $ 159,020,000 $ 119,076,000    
Property and equipment, net 79,123,000   73,753,000  
Goodwill 1,137,707,000   1,138,805,000 718,587,000
Reconciliation of EBITDA to net income (loss) [Abstract]        
EBITDA 14,306,000 26,992,000    
Purchase amortization in cost of revenues (6,347,000) (2,877,000)    
Purchase amortization in operating expenses (7,142,000) (3,299,000)    
Depreciation and other amortization (4,324,000) (3,675,000)    
Interest income 294,000 137,000    
Interest expense (2,343,000) (1,615,000)    
Income tax expense, net (571,000) (5,923,000)    
Net income (loss) (6,127,000) 9,740,000    
Reconciliation of operating segment assets to total assets [Abstract]        
Total operating segment assets 2,195,970,000   2,180,664,000  
Investment in subsidiaries (18,344,000)   (18,344,000)  
Intersegment receivables (77,925,000)   (78,638,000)  
Total assets 2,099,701,000   2,083,682,000  
Reconciliation of operating segment liabilities to total liabilities [Abstract]        
Total operating segment liabilities 651,611,000   640,416,000  
Intersegment payables (66,868,000)   (70,280,000)  
Total liabilities 584,743,000   570,136,000  
North America [Member]        
Segment Reporting Information [Line Items]        
North America corporate allocation 200,000 400,000    
Summarized information by operating segment [Abstract]        
Revenues 153,017,000 113,326,000    
Property and equipment, net 76,512,000   71,209,000  
Goodwill 1,114,363,000   1,114,363,000 692,639,000
Reconciliation of EBITDA to net income (loss) [Abstract]        
EBITDA 13,677,000 26,368,000    
Reconciliation of operating segment assets to total assets [Abstract]        
Total operating segment assets 2,157,218,000   2,138,768,000  
Reconciliation of operating segment liabilities to total liabilities [Abstract]        
Total operating segment liabilities 580,751,000   564,832,000  
International [Member]        
Segment Reporting Information [Line Items]        
International corporate allocation 100,000 100,000    
Summarized information by operating segment [Abstract]        
Revenues 6,011,000 5,750,000    
Property and equipment, net 2,611,000   2,544,000  
Goodwill 23,344,000   24,442,000 25,948,000
Reconciliation of EBITDA to net income (loss) [Abstract]        
EBITDA 629,000 624,000    
Reconciliation of operating segment assets to total assets [Abstract]        
Total operating segment assets 38,752,000   41,896,000  
Reconciliation of operating segment liabilities to total liabilities [Abstract]        
Total operating segment liabilities 70,860,000   75,584,000  
External Customers [Member]        
Summarized information by operating segment [Abstract]        
Revenues 6,003,000 5,750,000    
Intersegment Revenue [Member]        
Summarized information by operating segment [Abstract]        
Revenues 8,000 0    
Intersegment Elimination [Member]        
Summarized information by operating segment [Abstract]        
Revenues $ (8,000) $ 0