Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2018

Fair Value Disclosures [Abstract]

Fair Value Measurements

The following table summarizes the fair value balances (in thousands):

			Fair Value Measurement at
			September 30, 2018
	Total		Level 1		Level 2		Level 3
Assets:
Deferred compensation assets (1)	$	49,443	$	—	$	49,443	$	—
5 year interest rate swap	196		—		196		—
10 year interest rate swap	562		—		562		—
	50,201		—		50,201		—
Liabilities:
Deferred compensation plan	$	40,452	$	—	$	40,452	$	—
	$	40,452	$	—	$	40,452	$	—

			Fair Value Measurement at
			December 31, 2017
	Total		Level 1		Level 2		Level 3
Assets:
Deferred compensation assets (1)	$	46,145	$	—	$	46,145	$	—
5 year interest rate swap	70		—		70		—
	$	46,215	$	—	$	46,215	$	—
Liabilities:
Deferred compensation plan	$	37,280	$	—	$	37,280	$	—
10 year interest rate swap	492		—		492		—
	$	37,772	$	—	$	37,772	$	—
(1) Deferred compensation assets consist of the cash surrender value of life insurance policies and are intended to assist in the funding of the deferred compensation agreements.