Fair Value of Financial Instruments (Tables)

3 Months Ended

12 Months Ended

Mar. 31, 2013

Dec. 31, 2012

Fair Value Hierarchy Level for Company's Liabilities Measured

determine fair value. Fair value measurements and the fair value hierarchy level for the Company’s liabilities measured or disclosed at fair value on a recurring basis as of December 31, 2012 and March 31, 2013, are shown below:

	December 31, 2012
Contract	Asset (Liability)			Level 1		Level 2			Level 3
Interest rate swap	$	(68	)	$	—	$	(68	)	$	—
Forward foreign exchange contracts		(29	)		—		(29	)		—
Total	$	(97	)	$	—	$	(97	)	$	—
	March 31, 2013
Contract	Asset (Liability)			Level 1		Level 2			Level 3
Interest rate swap	$	(40	)	$	—	$	(40	)	$	—
Forward foreign exchange contracts		338			—		338			—
Total	$	298		$	—	$	298		$	—

Fair value measurements and the fair value hierarchy level for the Company’s liabilities measured or disclosed at fair value on a recurring basis as of December 31, 2011 and 2012, are shown below:

	December 31, 2011
Contract	Asset (Liability)			Level 1		Level 2			Level 3
Interest rate swap	$	(156	)	$	—	$	(156	)	$	—
Forward foreign exchange contracts		(4,269	)		—		(4,269	)		—
Total	$	(4,425	)	$	—	$	(4,425	)	$	—
	December 31, 2012
Contract	Asset (Liability)			Level 1		Level 2			Level 3
Interest rate swap	$	(68	)	$	—	$	(68	)	$	—
Forward foreign exchange contracts		(29	)		—		(29	)		—
Total	$	(97	)	$	—	$	(97	)	$	—