Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2018

Fair Value Disclosures [Abstract]

Fair Value Measurements

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

			Fair Value Measurement at
			March 31, 2018
	Total		Level 1		Level 2		Level 3
Assets:
Deferred compensation assets (1)	$	45,527	$	—	$	45,527	$	—
5 year interest rate swap	180		—		180		—
10 year interest rate swap	108		—		108		—
	45,815		—		45,815		—
Liabilities:
Deferred compensation plan	$	36,975	$	—	$	36,975	$	—
	$	36,975	$	—	$	36,975	$	—

				Fair Value Measurement at
				December 31, 2017
	Total			Level 1		Level 2			Level 3
Assets:
Deferred compensation assets (1)	$	46,145		$	—	$	46,145		$	—
Liabilities:
Deferred compensation plan	$	37,280		$	—	$	37,280		$	—
5 year interest rate swap	(70		)	—		(70		)	—
10 year interest rate swap	492			—		492			—
	$	37,702		$	—	$	37,702		$	—
(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.