Investments (Tables)

3 Months Ended

Mar. 31, 2012

Investments, Debt and Equity Securities [Abstract]

Investments

The Company’s investments, excluding cash surrender value of insurance contracts of $67,068 and $67,699 as of March 31, 2012 and December 31, 2011, respectively, consist of the following:

	Cost Basis		Unrealized Gain (Loss)			Fair Value
As of March 31, 2012
Short-term investments:
Certificates of deposit	$	264,896	$	—		$	264,896
U.S. dollar indexed bond funds	34,561		594			35,155
	$	299,457	$	594		$	300,051
Long-term investments:
Assets held in a rabbi trust	$	7,302	$	506		$	7,808
As of December 31, 2011
Short-term investments:
Certificates of deposit	$	269,033	$	—		$	269,033
U.S. dollar indexed bond funds	16,482		1,338			17,820
	$	285,515	$	1,338		$	286,853
Long-term investments:
Assets held in a rabbi trust	$	7,428	$	(258	)	$	7,170