Condensed Financial Information (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Revenue Recognized Under Net Reporting Arrangements	$ 8,778	$ 11,229
Inflationary Percentage	100.00%
Effect Of Currency Devaluation Per Diluted Share	$ 0.03
Description Of Foreign Currency Devaluation Effects	On January 8, 2010, the Venezuelan government announced the devaluation of the Bolivar Fuerte and the establishment of a two-tiered exchange structure. In February 2013, the Venezuelan Government announced a further devaluation of the Bolivar Fuerte. Accordingly, the Company recorded a charge of approximately $0.03 per diluted share during the first quarter of 2013.