Summary of Significant Accounting Policies (Tables)

3 Months Ended

12 Months Ended

Mar. 31, 2013

Dec. 31, 2012

Summary of Significant Accounting Policies

Fair value information about assets and liabilities

	March 31, 2013		Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable (Level 3)
Description
Forward exchange contracts	$	2,148	$	—	$	2,148	$	—
Total	$	2,148	$	—	$	2,148	$	—

	December 31, 2012		Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable (Level 3)
Description
Forward exchange contracts	$	3,802	$	—	$	3,802	$	—
Total	$	3,802	$	—	$	3,802	$	—

	December 31, 2012		Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable (Level 3)
Description
Forward exchange contracts	$	3,802	$	—	$	3,802	$	—
Total	$	3,802	$	—	$	3,802	$	—

	December 31, 2011			Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)			Significant Unobservable (Level 3)
Description
Forward exchange contracts	$	(3,502	)	$	—	$	(3,502	)	$	—
Total	$	(3,502	)	$	—	$	(3,502	)	$	—