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SEGMENT AND GEOGRAPHICAL REPORTING, Adjustments (Details) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Adjustment for [Abstract]      
Operating income for reportable segments $ 153,398,000 $ 133,518,000 $ 89,866,000
Amortization of intangibles 11,830,000 10,886,000 6,572,000
Corporate and other expense, net 40,644,000 32,110,000 27,809,000
Operating income 100,924,000 90,522,000 55,485,000
Interest expense 6,282,000 5,560,000 3,518,000
Other expense (income), net (75,000) (47,000) (28,000)
Income before income taxes 94,717,000 85,009,000 51,995,000
Identifiable assets at year end 635,277,000 569,732,000  
Depreciation 9,830,000 7,196,000 3,510,000
Corporate [Member]
      
Adjustment for [Abstract]      
Capital expenditures 900,000 9,000,000 2,500,000
Identifiable assets at year end 20,600,000 22,000,000 11,200,000
Depreciation $ 1,200,000 $ 1,000,000 $ 800,000