Exchange Rates Used for Translation of Balance Sheet and Statement of Operations (Detail)	3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012
PLN / US$
Effects Of Foreign Currency Movements [Line Items]
Balance sheet rate	3.2590	3.0996
Average rate	3.1469	3.2249
RUR / US$
Effects Of Foreign Currency Movements [Line Items]
Balance sheet rate	31.0381	30.4779
Average rate	30.4048	30.1674
HUF / US$
Effects Of Foreign Currency Movements [Line Items]
Balance sheet rate	237.8832	221.4000
Average rate	224.7786	225.5175