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Trade Accounts Receivable, Net - Allowance Movement (Table) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Trade Accounts Receivable, Net [Abstract]
Balance as January 1	$ 3,139	$ 0
Bad debt expense	0	3,139	2,131
Less: Amount written off during the year	0	0
Balance as at December 31	$ 0	$ 3,139	$ 0

Amount of the current period expense charged against operations, the offset which is generally to the allowance for doubtful accounts for the purpose of reducing receivables, including notes receivable, to an amount that approximates their net realizable value (the amount expected to be collected).

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