Annual report pursuant to Section 13 and 15(d)

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

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FAIR VALUE MEASUREMENTS, Assets and Liabilities Measured on Recurring Basis (Details) (Fair Value, Measurements, Recurring [Member], USD $)
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Assets:    
Cash equivalents $ 138,537,000 $ 96,293,000
Forward currency contracts 355,000 6,000
Interest rate cap 7,000 167,000
Investments in rabbi trusts 0 3,576,000
Stock options 1,060,000 278,000
Total 139,959,000 100,320,000
Liabilities:    
Interest rate swaps 3,037,000 2,119,000
Forward currency contracts 0 2,769,000
Contingent consideration 8,363,000 15,976,000
Other current liabilities 0 3,576,000
Total 11,400,000 24,440,000
Fair Value, Inputs, Level 1 [Member]
    
Assets:    
Cash equivalents 138,537,000 96,293,000
Forward currency contracts 0 0
Interest rate cap 0 0
Investments in rabbi trusts 0 3,576,000
Stock options 0 0
Total 138,537,000 99,869,000
Liabilities:    
Interest rate swaps 0 0
Forward currency contracts 0 0
Contingent consideration 0 0
Other current liabilities 0 3,576,000
Total 0 3,576,000
Fair Value, Inputs, Level 2 [Member]
    
Assets:    
Cash equivalents 0 0
Forward currency contracts 355,000 6,000
Interest rate cap 7,000 167,000
Investments in rabbi trusts 0 0
Stock options 0 0
Total 362,000 173,000
Liabilities:    
Interest rate swaps 3,037,000 2,119,000
Forward currency contracts 0 2,769,000
Contingent consideration 0 0
Other current liabilities 0 0
Total 3,037,000 4,888,000
Fair Value, Inputs, Level 3 [Member]
    
Assets:    
Cash equivalents 0 0
Forward currency contracts 0 0
Interest rate cap 0 0
Investments in rabbi trusts 0 0
Stock options 1,060,000 278,000
Total 1,060,000 278,000
Liabilities:    
Interest rate swaps 0 0
Forward currency contracts 0 0
Contingent consideration 8,363,000 15,976,000
Other current liabilities 0 0
Total 8,363,000 15,976,000
Change in contingent consideration $ (7,600,000) $ 16,000,000