Acquisitions (Narrative) (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Business Acquisition [Line Items]
Business combinations, provisional information, initial accounting incomplete, nature of adjustments	The Company will revise its preliminary allocations for acquired businesses if new information is obtained about the facts and circumstances existing as of the date of acquisition, or for purchase price adjustments, based on the final net assets and net working capital of the acquired business, as prescribed in the applicable purchase agreement. Such adjustments result in the recognition of, or adjust the fair values of, acquired assets and assumed liabilities, which results in the revision of comparative prior period financial information. These measurement period adjustments are presented as if the adjustments had been taken into account as of the date of acquisition. All changes that do not qualify as measurement period adjustments are included in current period results.
Business combinations, acquisition costs	$ 1.6	$ 0.7	$ 1.6
2013 Acquisitions [Member]
Business Acquisition [Line Items]
Business combinations, provisional information, initial accounting incomplete, items	For the year ended December 31, 2013, the Company acquired several businesses, as discussed below, for which the allocations of purchase price to the fair values of tangible and intangible assets and liabilities, including the estimated values of contingent earn-out obligations and the estimated useful lives of acquired assets for these acquisitions, are provisional and remain preliminary as of December 31, 2013. Management continues to assess the valuation of these items and any ultimate purchase price adjustments that may result based on the final net assets and net working capital of the acquired businesses, as prescribed in the corresponding purchase agreements.