Valuation Technique and Inputs Used to Determine Fair Value of Assets Or Liabilities (Detail)	12 Months Ended
	Dec. 31, 2013
Discount Rate
Fair Value Assets And Liabilities Measured On Unobservable Inputs [Line Items]
Contingent consideration, weighted average	6.00%
Probability of Payment
Fair Value Assets And Liabilities Measured On Unobservable Inputs [Line Items]
Contingent consideration, weighted average	31.00%
Minimum | Discount Rate
Fair Value Assets And Liabilities Measured On Unobservable Inputs [Line Items]
Contingent consideration	1.00%
Minimum | Probability of Payment
Fair Value Assets And Liabilities Measured On Unobservable Inputs [Line Items]
Contingent consideration	0.00%
Maximum | Discount Rate
Fair Value Assets And Liabilities Measured On Unobservable Inputs [Line Items]
Contingent consideration	10.00%
Maximum | Probability of Payment
Fair Value Assets And Liabilities Measured On Unobservable Inputs [Line Items]
Contingent consideration	100.00%