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Derivatives | 3 Months Ended
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Mar. 31, 2012
Summary of Derivative Instruments [Abstract] |
Derivatives | Derivatives At March 31, 2012, BancShares had an interest rate swap that qualifies as a cash flow hedge under US GAAP. BancShares had two earlier interest rate swaps that were entered into in 2006 and 2009, respectively. The 2006 swap matured on June 30, 2011 while the 2009 swap was terminated in December 2011. Both of the earlier interest rate swaps qualified as cash flow hedges during the period of time they were in effect. For all periods presented, the fair value of the outstanding derivatives is included in other liabilities in the consolidated balance sheets and the net change in fair value is included in other liabilities in the consolidated statements of cash flows. The interest rate swaps are used for interest rate risk management purposes and convert variable-rate exposure on outstanding debt to a fixed rate. The 2011 interest rate swap has a notional amount of $93,500, representing the amount of variable-rate trust preferred capital securities issued during 2006 and still outstanding at the swap inception date. The 2011 interest rate swap hedges interest payments through June 2016 and requires fixed-rate payments by BancShares at 5.50 percent in exchange for variable-rate payments of 175 basis points above 3-month LIBOR, which is equal to the interest paid to the holders of the trust preferred capital securities. Settlement of the swap occurs quarterly. As of March 31, 2012, collateral with a fair value of $14,668 was pledged to secure the existing obligation under the interest rate swap. The 2006 interest rate swap hedged interest payments through June 2011 and required fixed-rate payments by BancShares at 7.125 percent in exchange for variable-rate payments of 175 basis points above 3-month LIBOR, which is equal to the interest paid to the holders of the trust preferred capital securities. The 2009 Swap, which was intended to convert variable-rate exposure on outstanding debt to a fixed rate during the period July 2011 through June 2016, required fixed-rate payments by BancShares at 5.50 percent in exchange for variable-rate payments of 175 basis points above 3-month LIBOR. The 2009 interest rate swap was terminated in December 2011 due to the purchase of $21,500 of the underlying trust preferred capital securities.
| March 31, 2012 |  | December 31, 2011 |  | March 31, 2011
| Notional amount |  | Estimated fair value of liability |  | Notional amount |  | Estimated fair value of liability |  | Notional amount |  | Estimated fair value of liability
2006 interest rate swap hedging variable rate exposure on trust preferred securities 2006-2011 | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 115,000 |  |  | $ | 1,450 |
2009 interest rate swap hedging variable rate exposure on trust preferred securities 2011 | — |  |  | — |  |  | — |  |  | — |  |  | 115,000 |  |  | 6,325 |
2011 interest rate swap hedging variable rate exposure on trust preferred securities 2011-2016 | 93,500 |  |  | 10,325 |  |  | 93,500 |  |  | 10,714 |  |  | — |  |  | — |
|  |  | $ | 10,325 |  |  |  |  | $ | 10,714 |  |  |  |  | $ | 7,775 |
For cash flow hedges, the effective portion of the gain or loss due to changes in the fair value of the derivative hedging instrument is included in other comprehensive income, while the ineffective portion, representing the excess of the cumulative change in the fair value of the derivative over the cumulative change in expected future discounted cash flows on the hedged transaction, is recorded in the consolidated income statement. BancShares’ interest rate swaps have been fully effective since inception. Therefore, changes in the fair value of the interest rate swaps have had no impact on net income. For the three month periods ended March 31, 2012 and 2011, BancShares recognized interest expense of $749 and $1,458, respectively, resulting from incremental interest paid to the interest rate swap counterparty, none of which related to ineffectiveness. The following table discloses activity in accumulated other comprehensive income (loss) related to the interest rate swaps during the three month periods ended March 31, 2012 and 2011.
| 2012 |  | 2011
Accumulated other comprehensive loss resulting from interest rate swaps as of January 1 | $ | (10,714 | ) |  | $ | (9,492 | )
Other comprehensive income (loss) recognized during three month period ended March 31 | 389 |  |  | 1,717 |
Accumulated other comprehensive loss resulting from interest rate swaps as of March 31 | $ | (10,325 | ) |  | $ | (7,775 | )
BancShares monitors the credit risk of the interest rate swap counterparty.

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- Definition The entire disclosure for the entity's entire derivative instruments and hedging activities. Describes an entity's risk management strategies, derivatives in hedging activities and non-hedging derivative instruments, the assets, obligations, liabilities, revenues and expenses arising therefrom, and the amounts of and methodologies and assumptions used in determining the amounts of such items. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5580258-113959 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(n)) -URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5618551-113959 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5624163-113959 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4J -URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5708773-113959 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6935481&loc=d3e41638-113959 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5624171-113959 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6935481&loc=d3e41620-113959 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6935481&loc=d3e41641-113959 Reference 11: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6887037&loc=d3e80748-113994 Reference 12: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6441202&loc=d3e80720-113993 Reference 13: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6887037&loc=d3e80784-113994 Reference 14: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5579240-113959 Reference 15: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6935481&loc=d3e41635-113959 Reference 16: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4E -URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5624181-113959 Reference 17: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4H -URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5624258-113959 Reference 18: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5579245-113959 Reference 19: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 25 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6886632&loc=d3e76258-113986 Reference 20: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 45 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. 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