Reconciliation of Adjusted Segment Earnings before Interest, Taxes, Depreciation and Amortization (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Segment Reporting Information [Line Items]    
Total Adjusted Segment EBITDA $ 71,932 $ 70,552
Segment depreciation expense (6,991) (7,548)
Amortization of other intangible assets (3,012) (4,616)
Unallocated corporate expenses, excluding special charges (14,081) (20,393)
Interest income and other (137) 1,003
Interest expense (12,368) (12,655)
Remeasurement of acquisition-related contingent consideration   2,122
Income before income tax provision $ 35,343 $ 28,465