Investments (Tables)

6 Months Ended

Jun. 30, 2013

Investments, Debt and Equity Securities [Abstract]

Investments

The Company’s investments, excluding cash surrender value of insurance contracts of $70,632 and $70,318 as of June 30, 2013 and December 31, 2012, respectively, consist of the following:

	Cost Basis		Unrealized Gain			Fair Value
As of June 30, 2013
Short-term investments:
Certificates of deposit	$	211,496	$	—		$	211,496
U.S. dollar indexed bond funds	28,911		3,032			31,943
	$	240,407	$	3,032	....	$	243,439
Long-term investments:
Assets held in a rabbi trust	$	6,136	$	1,031		$	7,167
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