Redeemable Noncontrolling Interests - Additional Information (Detail) (Central American joint venture [Member], USD $) In Millions, unless otherwise specified	1 Months Ended
Mar. 31, 2013
Noncontrolling Interest [Line Items]
Acquired additional interest	10.00%
Acquired additional interest value	$ 6.0
Ownership interest after acquisition	100.00%
Additional Paid-In Capital [Member]
Noncontrolling Interest [Line Items]
Adjusted non-controlling interest	$ 5.7

The cash outflow associated with the purchase of noncontrolling interest during the period.

Reference 1: 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_PaymentsToAcquireAdditionalInterestInSubsidiaries
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration