Investments (Tables)

12 Months Ended

Dec. 31, 2012

Investments, Debt and Equity Securities [Abstract]

Investments

The Company’s investments, excluding cash surrender value of insurance contracts of $70,318 and $67,699 as of December 31, 2012 and 2011, respectively, consist of the following:

	Cost Basis		Unrealized Gain/(Loss)			Fair Value
As of December 31, 2012
Short-term investments:
Certificates of deposit	$	258,518	$	—		$	258,518
U.S. dollar indexed bond funds	3,249		119			3,368
	$	261,767	$	119		$	261,886
Long-term investments:
Assets held in a rabbi trust	$	6,266	$	517		$	6,783
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