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Reconciliation of Adjusted Segment Earnings before Interest, Taxes, Depreciation and Amortization (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Segment Reporting Information [Line Items]    
Total Adjusted Segment EBITDA $ 70,552 $ 75,360
Segment depreciation expense (7,548) (6,876)
Amortization of other intangible assets (4,616) (5,564)
Special charges   (427)
Unallocated corporate expenses, excluding special charges (20,393) (17,164)
Interest income and other 1,003 937
Interest expense (12,655) (12,715)
Remeasurement of acquisition-related contingent consideration 2,122  
Income before income tax provision $ 28,465 $ 33,551