This item represents the aggregate fair value of investments in debt and equity securities in an unrealized loss position which are categorized neither as held-to-maturity nor trading securities.

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This item represents the net total realized and unrealized gain (loss) included in earnings for the period as a result of selling or holding marketable securities categorized as trading, available-for-sale, or held-to-maturity, including the unrealized holding gain (loss) of held-to-maturity securities transferred to the trading security category and the cumulative unrealized gain (loss) which was included in other comprehensive income (a separate component of shareholders' equity) for available-for-sale securities transferred to trading securities during the period. Additionally, this item would include any gains (losses) realized during the period from the sale of investments accounted for under the cost method of accounting.

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Securities, Other Than Temporary Impairment (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended			3 Months Ended		12 Months Ended
	Sep. 30, 2013 Security	Sep. 30, 2012	Dec. 31, 2012	Sep. 30, 2012 Trust Preferred Securities Subject to Mandatory Redemption [Member]	Jun. 30, 2012 Trust Preferred Securities Subject to Mandatory Redemption [Member]	Dec. 31, 2011 Trust Preferred Securities Subject to Mandatory Redemption [Member]	Sep. 30, 2013 Trust Preferred Securities Subject to Mandatory Redemption [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of securities temporarily impaired	117
Number of securities temporarily impaired in investment grade	116
Number of securities temporarily impaired in speculative grade	1
Securities in investment portfolio	$ 103,069		$ 50,821				$ 0
Recognized net loss				149	142
Credit losses recognized	$ 0	$ 0		$ 0		$ 2,400
Number of securities not temporarily impaired	1