Future Minimum Lease Payments Receivable (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012
Operating Leases
Three months ending December 31, 2012	$ 593
Year ending December 31, 2013	1,134
2014	398
2015	321
2016	27
Operating Leases, Future Minimum Payments Receivable, Total	2,473
Direct Financing Leases
Three months ending December 31, 2012	89
Year ending December 31, 2013	165
2014
2015
2016
Capital Leases, Future Minimum Payments Receivable, Total	254
Total
Three months ending December 31, 2012	682
Year ending December 31, 2013	1,299
2014	398
2015	321
2016	27
Operating and Capital Leases, Future Minimum Payments, Receivable, Total	$ 2,727

Amount of minimum lease payments to be received by the lessor for capital leases.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 30

-Section 50

-Paragraph 4

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6952072&loc=d3e45377-112738

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 13

-Paragraph 23

-Subparagraph a(i)(a)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.