Investments (Tables)

3 Months Ended

Mar. 31, 2013

Investments, Debt and Equity Securities [Abstract]

Investments

The Company’s investments, excluding cash surrender value of insurance contracts of $69,857 and $70,318 as of March 31, 2013 and December 31, 2012, respectively, consist of the following:

	Cost Basis		Unrealized Gain		Fair Value
As of March 31, 2013
Short-term investments:
Certificates of deposit	$	223,339	$	—	$	223,339
U.S. dollar indexed bond funds	33,917		9		33,926
	$	257,256	$	9	$	257,265
Long-term investments:
Assets held in a rabbi trust	$	6,348	$	1,016	$	7,364
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