Consolidated Statements of Shareholders' Equity (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
Dec. 31, 2011	Dec. 31, 2010
Preferred Stock, Dividends, Per Share, Cash Paid	$ 0.06	$ 12.50
Issuance of Common Stock, Cost	$ 20,429

Aggregate dividends paid during the period for each share of preferred stock outstanding.

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration