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Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data	Jun. 30, 2011	Dec. 31, 2010
Consolidated Balance Sheets [Abstract]
Securities held to maturity, fair value	$ 92,149	$ 145,143
Shareholder's Equity
Common stock authorized (in shares)	250,000,000	250,000,000
Common stock issued (in shares)	64,119,235	63,917,591
Common stock outstanding (in shares)	64,119,235	63,917,591

Total number of shares of common stock held by shareholders. May be all or portion of the number of common shares authorized. These shares represent the ownership interest of the common shareholders. Shares outstanding equals shares issued minus shares held in treasury and other adjustments, if any.

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- Definition

This item represents the aggregate fair value of investments in debt securities as of the balance sheet date and which are categorized as held-to-maturity.

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