Quarterly report pursuant to Section 13 or 15(d)

FAIR VALUE MEASUREMENTS, Assets and Liabilities Measured on Recurring and Non-Recurring Basis (Details)

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FAIR VALUE MEASUREMENTS, Assets and Liabilities Measured on Recurring and Non-Recurring Basis (Details) (USD $)
9 Months Ended
Sep. 30, 2012
Sep. 30, 2012
Nonrecurring [Member]
Sep. 30, 2012
Recurring [Member]
Dec. 31, 2011
Recurring [Member]
Sep. 30, 2012
Level 1 [Member]
Recurring [Member]
Dec. 31, 2011
Level 1 [Member]
Recurring [Member]
Sep. 30, 2012
Level 2 [Member]
Recurring [Member]
Dec. 31, 2011
Level 2 [Member]
Recurring [Member]
Sep. 30, 2012
Level 3 [Member]
Recurring [Member]
Dec. 31, 2011
Level 3 [Member]
Recurring [Member]
Assets:                    
Cash equivalents     $ 131,954,000 $ 138,537,000 $ 131,954,000 $ 138,537,000 $ 0 $ 0 $ 0 $ 0
Forward currency contracts     272,000 355,000 0 0 272,000 355,000 0 0
Interest rate cap     0 7,000 0 0 0 7,000 0 0
Stock options     1,201,000 1,060,000 0 0 0 0 1,201,000 1,060,000
Total     133,427,000 139,959,000 131,954,000 138,537,000 272,000 362,000 1,201,000 1,060,000
Liabilities:                    
Interest rate swaps     3,133,000 3,037,000 0 0 3,133,000 3,037,000 0 0
Forward currency contracts     242,000 0 0 0 242,000 0 0 0
Contingent consideration     5,164,000 8,363,000 0 0 0 0 5,164,000 8,363,000
Total     8,539,000 11,400,000 0 0 3,375,000 3,037,000 5,164,000 8,363,000
Fair Value of Assets Measured on Nonrecurring Basis [Abstract]                    
Impairment related to definite-lived intangible assets $ 13,800,000 $ 13,800,000