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Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Assets
Securities held to maturity, fair value	$ 56,713	$ 62,515
Shareholders' Equity
Common stock, authorized (in shares)	250,000,000	250,000,000
Common stock, issued (in shares)	64,765,581	64,142,498
Common stock, outstanding (in shares)	64,765,581	64,142,498

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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