Fair Value - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Fair Value Of Financial Instruments [Line Items]
Contingent consideration obligations outstanding	$ 0.1
Contingent consideration at fair value	17.5	9.0
Business Acquisition Contingent Consideration Potential Cash Payment	2.5
Minority Interest Ownership Percentage By Noncontrolling Owners	33.00%
Business acquisition contingent consideration obligations, accounts payable and accrued liabilities	2.5
Business acquisition contingent consideration obligations, other liabilities	$ 10.7