Fair Value of Assets and Liabilities (Tables)

9 Months Ended

Sep. 30, 2012

Fair Value Disclosures [Abstract]

Summary of Assets and Liabilities Recorded at Fair Market Value

Assets and liabilities subject to fair value measurement are as follows:

	September 30, 2012						December 31, 2011
			Fair Value Measurements Using						Fair Value Measurements Using
	Fair Value		Level 1		Level 2		Fair Value		Level 1		Level 2
Assets
Short-term investments:
Certificates of deposit	$	252,124	$	252,124	$	—	$	269,033	$	269,033	$	—
U.S. dollar indexed bond funds	16,339		—		16,339		17,820		—		17,820
Assets held in a rabbi trust	7,051		7,051		—		7,170		7,170		—
Foreign exchange forward contracts	512		—		512		2,193		—		2,193
Total	$	276,026	$	259,175	$	16,851	$	296,216	$	276,203	$	20,013
Liabilities
Deferred compensation	$	7,051	$	7,051	$	—	$	7,170	$	7,170	$	—
Foreign exchange forward contracts	1,604		—		1,604		1,983		—		1,983
Interest rate swaps	3,870		—		3,870		3,796		—		3,796
Total	$	12,525	$	7,051	$	5,474	$	12,949	$	7,170	$	5,779

Fair value and carrying value of the Company's debt instruments

The fair value and carrying value of the Company’s debt instruments are summarized as follows:

	September 30, 2012				December 31, 2011
	Fair Value		Carrying Value		Fair Value		Carrying Value
Notes payable	$	75,000	$	75,000	$	21,722	$	21,722
Long-term debt	661,805		647,863		612,551		606,154
Total debt instruments	$	736,805	$	722,863	$	634,273	$	627,876