Construction Contracts in Progress (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013 contract	Dec. 31, 2012 contract
LongTermContractsOrProgramsDisclosureTextBlockAbstract
Number of Contracts	3	2
Provision for Loss on Contracts (in Dollars)	$ 68	$ 57

Cumulative provision for contract losses not offset against related costs accumulated on the balance sheet.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 605

-SubTopic 35

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6802688&loc=d3e57777-111642

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

-Publisher AICPA

-Name Statement of Position (SOP)

-Number 81-1

-Paragraph 89

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Name:	us-gaap_ProvisionForLossOnContracts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant