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CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
CONSOLIDATED BALANCE SHEETS
Held to maturity, fair value (in dollars)	$ 162,528	$ 976
Common stock, authorized shares	185,000,000	185,000,000
Common stock, issued shares	41,867,046	41,749,116
Common stock, outstanding shares	41,867,046	41,749,116

- Definition

Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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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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