Real Estate (Summary of NHC Percentage Rent) (Details) (National Healthcare Corporation [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Total percentage rent	$ 568	$ 382	$ 1,882	$ 1,762
Current year [Member]
Total percentage rent	568	382	1,136	765
Prior year final certification [Member]
Total percentage rent	$ 0	$ 0	$ 746	$ 997

- 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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