Fair Value of Assets and Liabilities (Tables)

9 Months Ended

Sep. 30, 2013

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, 2013						December 31, 2012
			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	$	160,286	$	160,286	$	—	$	258,518	$	258,518	$	—
U.S. dollar indexed bond funds	39,417		—		39,417		3,368		—		3,368
Assets held in a rabbi trust	7,136		7,136		—		6,783		6,783		—
Foreign exchange forward contracts	469		—		469		960		—		960
Total	$	207,308	$	167,422	$	39,886	$	269,629	$	265,301	$	4,328
Liabilities
Deferred compensation	$	7,136	$	7,136	$	—	$	6,783	$	6,783	$	—
Foreign exchange forward contracts	1,861		—		1,861		913		—		913
Interest rate swaps	2,605		—		2,605		3,558		—		3,558
Total	$	11,602	$	7,136	$	4,466	$	11,254	$	6,783	$	4,471

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, 2013				December 31, 2012
	Fair Value		Carrying Value		Fair Value		Carrying Value
Notes payable	$	26,773	$	26,773	$	34,212	$	34,212
Long-term debt	567,918		561,595		630,450		617,534
Total debt instruments	$	594,691	$	588,368	$	664,662	$	651,746