Acquisitions (Modesto acquisition) - Additional Information (Detail) (USD $)	6 Months Ended	1 Months Ended
Jul. 13, 2013	Jul. 27, 2013 Modesto	Jul. 27, 2013 Modesto DSD segment
Business Acquisition [Line Items]
Business acquisition	$ 18,000,000	$ 10,300,000
Goodwill acquired			$ 4,200,000

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 13

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585

Name:	us-gaap_PaymentsToAcquireBusinessesGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration