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Summary of Significant Accounting Policies (Details) - Summary of the allowance for uncollectible accounts (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012
Summary of the allowance for uncollectible accounts [Abstract]
Balance at beginning of year	$ 884	$ 1,326	$ 64
Provisions	115	434
Deductions	(935)	(876)
Balance at end of year	$ 64	$ 884

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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