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Income Tax Provision from Continuing Operations Resulted in Effective Tax Rates (Detail) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Reconciliation of Provision of Income Taxes [Line Items]                      
Income tax expense at federal statutory rate                 $ 11,134 $ 1,090 $ 53,595
State income taxes, net of federal benefit                 3,270 3,607 4,166
Benefit from lower foreign tax rates                 (5,214) (5,357) (7,115)
Non-deductible goodwill impairment                 29,313 38,635  
Valuation allowance on foreign tax credits & net operating loss carryforward                 8,206    
Other expenses not deductible for tax purposes                 2,872 3,682 2,791
Changes in non-taxable contingent consideration                 (2,777) (1,151) (2,367)
Other adjustments, net                 (4,399) (406) (1,846)
Income tax provision $ 5,859 $ 3,360 $ 23,315 $ 9,871 $ 13,728 $ 12,251 $ 3,527 $ 10,594 $ 42,405 $ 40,100 $ 49,224