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Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Assets
Securities held to maturity, fair value	$ 62,515	$ 145,143
Shareholders' Equity
Common stock, authorized (in shares)	250,000,000	250,000,000
Common stock, issued (in shares)	64,142,498	63,917,591
Common stock, outstanding (in shares)	64,142,498	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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