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Fair Value Measurements (Details Textual) (USD $)	9 Months Ended	12 Months Ended
Fair Value Measurements (Details Textual) (USD $)	Sep. 30, 2012	Dec. 31, 2011	Jun. 14, 2012
Fair Value Measurements (Textual) [Abstract]
Common share price, per share		$ 9.96	$ 9.53
Impairment of assets	$ 0	$ 0
Level 3 [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Fair value adjustment, net	$ (2,649,000)	$ (9,571,000)

The charge against earnings resulting from the aggregate write down of all assets from their carrying value to their fair value.

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- Definition

Amount of increase (decrease) of liabilities measured at fair value on a recurring basis using unobservable inputs (level 3) which have taken place during the period. Such increase (decrease) may be comprised of changes in fair value (gains or losses) whether realized or unrealized that have been included in earnings, changed net asset value, or other comprehensive income (a separate component of shareholders' equity); purchases, sales, issues, or settlements of assets; and net transfers in to or out of this category within the fair value hierarchy.

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