The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Remaining amortization period of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Represents the number of stores.

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The valuation allowance loss on real estate owned or any impairment losses taken against real estate investments held for use or resale.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-SubTopic 10
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Real Estate Assets - Additional Information (Detail)	12 Months Ended
Real Estate Assets - Additional Information (Detail)	Dec. 31, 2015 USD ($) Store	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Real Estate Properties [Line Items]
Number of stores \| Store	6
Valuation loss \| $	$ 0
Amortization expense related to the tenant relationships and lease rights \| $	$ 11,695,000	$ 12,996,000	$ 12,065,000
Amortization period of intangible assets-tenant relationships	18 months
Indiana [Member]
Real Estate Properties [Line Items]
Number of stores \| Store	1
Minimum [Member]
Real Estate Properties [Line Items]
Remaining amortization period (in years)	3 years
Maximum [Member]
Real Estate Properties [Line Items]
Remaining amortization period (in years)	46 years