Limits On Common Stock Ownership Limits On Common Stock Ownership	12 Months Ended
Dec. 31, 2017
Limits On Common Stock Ownership [Abstract]
Limits On Common Stock Ownership [Text Block]	LIMITS ON COMMON STOCK OWNERSHIP The Company’s charter contains certain provisions which are designed to ensure that the Company’s status as a REIT is protected for federal income tax purposes. One of these provisions ensures that any transfer which would cause NHI to be beneficially owned by fewer than 100 persons or would cause NHI to be “closely held” under the Internal Revenue Code would be void which, subject to certain exceptions, results in no stockholder being allowed to own, either directly or indirectly pursuant to certain tax attribution rules, more than 9.9% of the Company’s common stock. In 1991, the Board created an exception to this ownership limitation for Dr. Carl E. Adams, his spouse, Jennie Mae Adams, and their lineal descendants. Effective May 12, 2008, we entered into Excepted Holder Agreements with W. Andrew Adams and certain members of his family. These written agreements are intended to restate and replace the parties’ prior verbal agreement. Based on the Excepted Holder Agreements currently outstanding, the ownership limit for all other stockholders is approximately 7.5%. Our charter gives our Board of Directors broad powers to prohibit and rescind any attempted transfer in violation of the ownership limits. These agreements were entered into in connection with the Company’s stock purchase program pursuant to which the Company announced that it would purchase up to 1,000,000 shares of its common stock in the public market from its stockholders. A separate agreement was entered into severally with each of the spouse and children of Dr. Carl E. Adams and others within Mr. W. Andrew Adams’ family. We needed to enter into such an agreement with each family member because of the complicated ownership attribution rules under Internal Revenue Code. The Agreement permits the Excepted Holders to own common stock in excess of 9.9% up to the limit specifically provided in the individual agreement and not lose rights with respect to such shares. However, if the stockholder’s stock ownership exceeds the limit then such shares in excess of the limit become “Excess Stock” and lose voting rights and entitlement to receive dividends. The Excess Stock classification remains in place until the stockholder no longer exceeds the threshold limit specified in the Agreement. The purpose of these agreements is to ensure that the Company does not violate the prohibition against a REIT being closely held. W. Andrew Adams’ Excess Holder Agreement also provides that he will not own shares of stock in any tenant of the Company if such ownership would cause the Company to constructively own more than a 9.9% interest in such tenant. This prohibition is designed to protect the Company’s status as a REIT for tax purposes.

LIMITS ON COMMON STOCK OWNERSHIP

The Company’s charter contains certain provisions which are designed to ensure that the Company’s status as a REIT is protected for federal income tax purposes. One of these provisions ensures that any transfer which would cause NHI to be beneficially owned by fewer than 100 persons or would cause NHI to be “closely held” under the Internal Revenue Code would be void which, subject to certain exceptions, results in no stockholder being allowed to own, either directly or indirectly pursuant to certain tax attribution rules, more than 9.9% of the Company’s common stock. In 1991, the Board created an exception to this ownership limitation for Dr. Carl E. Adams, his spouse, Jennie Mae Adams, and their lineal descendants. Effective May 12, 2008, we entered into Excepted Holder Agreements with W. Andrew Adams and certain members of his family. These written agreements are intended to restate and replace the parties’ prior verbal agreement. Based on the Excepted Holder Agreements currently outstanding, the ownership limit for all other stockholders is approximately 7.5%. Our charter gives our Board of Directors broad powers to prohibit and rescind any attempted transfer in violation of the ownership limits. These agreements were entered into in connection with the Company’s stock purchase program pursuant to which the Company announced that it would purchase up to 1,000,000 shares of its common stock in the public market from its stockholders.

A separate agreement was entered into severally with each of the spouse and children of Dr. Carl E. Adams and others within Mr. W. Andrew Adams’ family. We needed to enter into such an agreement with each family member because of the complicated ownership attribution rules under Internal Revenue Code. The Agreement permits the Excepted Holders to own common stock in excess of 9.9% up to the limit specifically provided in the individual agreement and not lose rights with respect to such shares. However, if the stockholder’s stock ownership exceeds the limit then such shares in excess of the limit become “Excess Stock” and lose voting rights and entitlement to receive dividends. The Excess Stock classification remains in place until the stockholder no longer exceeds the threshold limit specified in the Agreement. The purpose of these agreements is to ensure that the Company does not violate the prohibition against a REIT being closely held. W. Andrew Adams’ Excess Holder Agreement also provides that he will not own shares of stock in any tenant of the Company if such ownership would cause the Company to constructively own more than a 9.9% interest in such tenant. This prohibition is designed to protect the Company’s status as a REIT for tax purposes.