Note 9 - Investments in Marketable Securities (Tables)

3 Months Ended

Mar. 31, 2019

Notes Tables

Available-for-sale Securities [Table Text Block]

	March 31, 2019				December 31, 2018
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Investments available for sale:
Marketable equity securities	$	30,176	$	147,061	$	30,176	$	140,223
Restricted investments available for sale:
Corporate debt securities		66,649		66,819		69,439		67,632
Asset-based securities		64,601		64,504		62,772		62,068
U.S. Treasury securities		20,091		19,748		22,038		21,457
State and municipal securities		21,715		21,736		21,818		21,436
	$	203,232	$	319,868	$	206,243	$	312,816

Schedule of Available-for-sale Securities Reconciliation [Table Text Block]

	March 31, 2019						December 31, 2018
	Shares		Cost		Fair Value		Shares		Cost		Fair Value
NHI Common Stock		1,630,642	$	24,734	$	128,087		1,630,642	$	24,734	$	123,179

Investments Classified by Contractual Maturity Date [Table Text Block]

	March 31, 2019				December 31, 2018
	Cost		Fair Value		Cost		Fair Value
Maturities:
Within 1 year	$	11,081	$	11,054	$	11,448	$	11,401
1 to 5 years		95,001		95,229		98,487		97,430
6 to 10 years		66,974		66,524		64,932		62,527
Over 10 years		--		--		1,200		1,235
	$	173,056	$	172,807	$	176,067	$	172,593