Derivative Financial Instruments - Additional Information (Detail) In Thousands, unless otherwise specified	1 Months Ended	12 Months Ended				1 Months Ended			1 Months Ended	12 Months Ended
	Jul. 31, 2011 Interest Rate Swap Contracts	Dec. 31, 2013 Interest Rate Swap USD ($)	Dec. 31, 2012 Interest Rate Swap USD ($)	Dec. 31, 2013 W.E.T	Dec. 31, 2012 W.E.T	Mar. 28, 2008 W.E.T Interest Rate Swap	Dec. 31, 2013 W.E.T Interest Rate Swap USD ($)	Dec. 31, 2013 W.E.T Interest Rate Swap EUR (€)	Mar. 31, 2013 Unicredit Bank EUR (€)	Dec. 31, 2013 Unicredit Bank USD ($)	Dec. 31, 2013 Unicredit Bank EUR (€)
Derivative Instruments [Line Items]
Derivative maturity period						10 years
Notional Value							$ 13,779	€ 10,000
Variable Rate				six month EURIBOR
Fixed interest rate					0.39%
Basis spread on variable rate					1.40%
Exchange rate					1.23
Derivative exchange rate					1.46
Legal settlement for CRS									144
Costs of all future obligations under CRS										11,828	8,584
Past due payments under CRS										7,413	5,380
Number of contracts	2
Hedge Ineffectiveness Incurred		$ 0	$ 0