Condensed Consolidated Balance Sheets (Parenthetical)	Jun. 30, 2013	Dec. 31, 2012
Statement of Financial Position [Abstract]
Common Stock, Shares, Authorized	250,000,000	250,000,000
Common Stock, Shares, Issued	62,928,000	63,453,000
Common Stock, Shares, Outstanding	60,802,000	60,354,000