Condensed Consolidated Statements of Operations (Unaudited) (Parentheticals) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2013	Mar. 31, 2012
Preferred stock dividends, accretion of issuance cost	$ 0	$ 77

Value of accretion of temporary equity to its redemption value during the period. This item is an adjustment to net income necessary to derive net income apportioned to common stockholders and is to be distinguished from Temporary Equity, Accretion to Redemption Value (TemporaryEquityAccretionToRedemptionValue).

No definition available.

Name:	us-gaap_TemporaryEquityAccretionToRedemptionValueAdjustment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration