Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2018

Fair Value Disclosures [Abstract]

Schedule of Financial Assets At Fair Value

Financial assets and liabilities carried at fair value as of December 31, 2018, are classified in the following table:

Description	Fair Market Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs     (Level 3)		Total Changes in Fair Values Included in Current Period Earnings
Short-term investments	$	7,499	$	5,594	$	1,905	$	-	$	-
Interest rate swaps and collars		4,731		-		4,731		-		-
Deferred compensation investments		10,104		3,377		6,727		-		-

Financial assets and liabilities carried at fair value as of December 31, 2017 are classified in the following table:

Description	Fair Market Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs     (Level 3)		Total Changes in Fair Values Included in Current Period Earnings
Short-term investments	$	4,558	$	2,586	$	1,972	$	-	$	-
Interest rate swap assets		3,884		-		3,884		-		-
Deferred compensation investments		8,843		1,450		7,393		-		-