Investment In Direct Financing Lease (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012
Schedule of Finance Lease Obligations [Line Items]
2013	$ 2,793
2014	2,793
2015	2,793
2016	2,793
2017	694
Total minimum obligation	11,866
Less unearned interest income	(2,633)
Less current portion of direct financing lease	(1,766)
Investment in direct financing lease	$ 7,467

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

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Amount of minimum lease payments to be received by the lessor in the fifth fiscal year following the latest fiscal year for capital leases.

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