Real Estate (Summary of NHC Percentage Rent) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Total percentage rent	$ 2,306	$ 1,869	$ 1,235
Current year [Member]
Total percentage rent	1,243	1,234	750
Final determination based on prior year revenues [Member]
Total percentage rent	$ 1,063	$ 635	$ 485

- Definition

This element represents the rental revenue earned during the period from lessee-operators based on revenues generated in their operations, generally in excess of a base amount. Such rental revenue is generally stipulated in the lease agreement, usually will provide for a fixed percentage of revenue to be paid as additional (or possibly only) rent due the lessor, and may be based on gross revenues, net revenues, or multiple variations thereof. Percentage rent is often required under leases with retail outlets located on premises owned by hoteliers, cruise lines, others in the hospitality industry, and shopping mall operators, among others.

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