Investments (Tables)

6 Months Ended

Jun. 30, 2012

Investments, Debt and Equity Securities [Abstract]

Investments

The Company’s investments, excluding cash surrender value of insurance contracts of $68,053 and $67,699 as of June 30, 2012 and December 31, 2011, respectively, consist of the following:

	Cost Basis		Unrealized Gain (Loss)			Fair Value
As of June 30, 2012
Short-term investments:
Certificates of deposit	$	245,989	$	—		$	245,989
U.S. dollar indexed bond funds	22,123		2,747			24,870
	$	268,112	$	2,747		$	270,859
Long-term investments:
Assets held in a rabbi trust	$	6,765	$	128		$	6,893
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