Note 11 - Deferred Compensation Plan (Tables)

3 Months Ended

Mar. 31, 2020

Notes Tables

Schedule of Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits by Title of Individual and Type of Deferred Compensation [Table Text Block]

	March 31,		December 31,
	2020		2019
Deferred compensation plan asset components:
Cash surrender value of corporate-owned life insurance policies	$	15,321	$	16,883
Fair value of mutual funds and money market funds		20,226		21,975
Total	$	35,547	$	38,858
Deferred compensation plan assets reported in:
Other long-term assets	$	35,547	$	38,858
Deferred compensation plan liabilities reported in:
Accrued compensation and related benefits (short-term)	$	155	$	425
Other long-term liabilities		36,627		39,665
Total	$	36,782	$	40,090