Condensed Consolidated Statements of Cash Flows (Unaudited) (Parenthetical)	Jun. 30, 2011	Dec. 31, 2010	Jun. 30, 2010
Cash flows from investing activities:
Convertible subordinated notes	7.5556%	7.5556%	7.5556%

Interest rate stated in the contractual debt agreement.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 22
-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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