Note 12 - Deferred Compensation Plan (Tables)

3 Months Ended

Mar. 31, 2019

Notes Tables

Schedule of Deferred Compensation Plan [Table Text Block]

	March 31,		December 31,
	2019		2018
Deferred compensation plan asset components:
Cash surrender value of corporate-owned life insurance policies	$	13,988	$	13,103
Fair value of mutual funds and money market funds		20,873		18,867
Total	$	34,861	$	31,970
Deferred compensation plan assets reported in:
Other long-term assets	$	34,861	$	31,970
Deferred compensation plan liabilities reported in:
Accrued compensation and related benefits (short-term)	$	425	$	447
Other long-term liabilities		35,310		32,283
Total	$	35,735	$	32,730