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Disclosures about fair value of assets and liabilities (Tables) | 6 Months Ended
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Jun. 30, 2013
Disclosures about Fair Value of Assets and Liabilities and Fair Value of Financial Instrument [Abstract] |
Fair value measurements of assets and liabilities recognized on a recurring basis |
|  |  |  |  | Quoted Prices in Active Markets for Identical Assets |  |  | Significant Other Observable Inputs |  |  | Significant Unobservable Inputs |
| Fair Value |  |  | (Level 1) |  |  | (Level 2) |  |  | (Level 3) |
June 30, 2013 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury and federal agencies |  | $ | 38,607 |  |  | $ | — |  |  | $ | 38,607 |  |  | $ | — |
State and municipal |  |  | 180,367 |  |  |  | — |  |  |  | 180,367 |  |  |  | — |
Federal agency collateralized mortgage obligations |  |  | 108,803 |  |  |  | — |  |  |  | 108,803 |  |  |  | — |
Federal agency mortgage-backed pools |  |  | 153,077 |  |  |  | — |  |  |  | 153,077 |  |  |  | — |
Private labeled mortgage-backed pools |  |  | 1,554 |  |  |  | — |  |  |  | 1,554 |  |  |  | — |
Corporate notes |  |  | 45 |  |  |  | — |  |  |  | 45 |  |  |  | — |
Total available-for-sale securities |  |  | 482,453 |  |  |  | — |  |  |  | 482,453 |  |  |  | — |
Hedged loans |  |  | 83,545 |  |  |  | — |  |  |  | 83,545 |  |  |  | — |
Forward sale commitments |  |  | 450 |  |  |  | — |  |  |  | 450 |  |  |  | — |
Interest rate swap agreements |  |  | (3,842 | ) |  |  | — |  |  |  | (3,842 | ) |  |  | — |
Commitments to originate loans |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
December 31, 2012 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury and federal agencies |  | $ | 51,779 |  |  | $ | — |  |  | $ | 51,779 |  |  | $ | — |
State and municipal |  |  | 172,905 |  |  |  | — |  |  |  | 172,905 |  |  |  | — |
Federal agency collateralized mortgage obligations |  |  | 96,831 |  |  |  | — |  |  |  | 96,831 |  |  |  | — |
Federal agency mortgage-backed pools |  |  | 159,204 |  |  |  | — |  |  |  | 159,204 |  |  |  | — |
Private labeled mortgage-backed pools |  |  | 2,031 |  |  |  | — |  |  |  | 2,031 |  |  |  | — |
Corporate notes |  |  | 51 |  |  |  | — |  |  |  | 51 |  |  |  | — |
Total available-for-sale securities |  |  | 482,801 |  |  |  | — |  |  |  | 482,801 |  |  |  | — |
Hedged loans |  |  | 81,018 |  |  |  | — |  |  |  | 81,018 |  |  |  | — |
Forward sale commitments |  |  | 858 |  |  |  | — |  |  |  | 858 |  |  |  | — |
Interest rate swap agreements |  |  | (7,707 | ) |  |  | — |  |  |  | (7,707 | ) |  |  | — |
Commitments to originate loans |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Schedule of fair value transfer among levels |
|  | Quoted Prices |  |  |  |  |  |  |  |  |  |
|  | in Active |  |  | Significant |  |  |  |  |  |  |
|  | Markets for |  |  | Other |  |  | Significant |  |  |  |
|  | Identical |  |  | Observable |  |  | Unobservable |  |  | Reason |
|  | Assets |  |  | Inputs |  |  | Inputs |  |  | for |
December 31, 2012 |  | (Level 1) |  |  | (Level 2) |  |  | (Level 3) |  |  | Transfer |
Transfers to level: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Hedged loans |  | $ | — |  |  | $ | 59,911 |  |  | $ | — |  |  |  | (a | )
Forward sale commitments |  |  | — |  |  |  | 510 |  |  |  | — |  |  |  | (b | )
Interest rate swap agreements |  |  | — |  |  |  | (6,464 | ) |  |  | — |  |  |  | (a | )
Commitments to originate loans |  |  | — |  |  |  | (71 | ) |  |  | — |  |  |  | (b | )
Total transfers to level |  | $ | — |  |  | $ | 53,886 |  |  | $ | — |  |  |  |  |
(a) | - Valuation determined by widely accepted techniques including discounted cash flow analysis on expected cash flows of each derivative and observable market rate inputs such as yield curves and contractual terms on each instrument.
(b) | - Valuation determined by quoted prices for similar loans in the secondary market with an expected fallout rate (interest rate locked pipeline loans not expected to close). Fallout rate is not considered a significant input to the fair value in its entirety.
Reconciliation of the beginning and ending balances of recurring fair value measurements recognized in the accompanying condensed consolidated balance sheet using significant unobservable (Level 3) inputs |
|  | Hedged Loans |  |  | Forward Sale Commitments |  |  | Interest Rate Swaps |  |  | Commitments to Originate Loans |
Beginning balance December 31, 2011 |  | $ | 54,362 |  |  | $ | 662 |  |  | $ | (7,101 | ) |  | $ | — |
Total realized and unrealized gains and losses |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Included in net income |  |  | (74 | ) |  |  | (152 | ) |  |  | 74 |  |  |  | (71 | )
Included in other comprehensive income, gross |  |  | — |  |  |  | — |  |  |  | 563 |  |  |  | — |
Purchases, issuances, and settlements |  |  | 6,114 |  |  |  | — |  |  |  | — |  |  |  | — |
Principal payments |  |  | (491 | ) |  |  | — |  |  |  | — |  |  |  | — |
Transfers out to Level 2 |  |  | (59,911 | ) |  |  | (510 | ) |  |  | 6,464 |  |  |  | 71 |
Ending balance December 31, 2012 |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Realized gains and losses included in net income for the periods in the condensed consolidated statements of income |
|  | Three Months Ended June 30 |  |  | Six Months Ended June 30 |
|  | 2013 |  |  | 2012 |  |  | 2013 |  |  | 2012 |
Non Interest Income Total gains and losses from: |  | (Unaudited) |  |  | (Unaudited) |  |  | (Unaudited) |  |  | (Unaudited) |
Hedged loans |  | $ | (1,444 | ) |  | $ | 298 |  |  | $ | (1,846 | ) |  | $ | 224 |
Fair value interest rate swap agreements |  |  | 1,444 |  |  |  | (298 | ) |  |  | 1,846 |  |  |  | (224 | )
Derivative loan commitments |  |  | (396 | ) |  |  | 503 |  |  |  | (408 | ) |  |  | 280 |
|  | $ | (396 | ) |  | $ | 503 |  |  | $ | (408 | ) |  | $ | 280 |
Other assets measured at fair value on a nonrecurring basis |
|  |  |  |  | Quoted Prices in Active Markets for Identical Assets |  |  | Significant Other Observable Inputs |  |  | Significant Unobservable Inputs |
| Fair Value |  |  | (Level 1) |  |  | (Level 2) |  |  | (Level 3) |
June 30, 2013 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impaired loans |  | $ | 6,992 |  |  | $ | — |  |  | $ | — |  |  | $ | 6,992 |
Mortgage servicing rights |  |  | 5,892 |  |  |  | — |  |  |  | — |  |  |  | 5,892 |
December 31, 2012 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impaired loans |  | $ | 8,652 |  |  | $ | — |  |  | $ | — |  |  | $ | 8,652 |
Mortgage servicing rights |  |  | 5,145 |  |  |  | — |  |  |  | — |  |  |  | 5,145 |
Qualitative information about unobservable inputs used in recurring and nonrecurring Level 3 fair value measurements, other than goodwill |
|  | Fair Value at June 30, 2013 |  |  | Valuation Technique |  | Unobservable Inputs |  | Range (Weighted Average)
Impaired loans |  | $ | 6,992 |  |  | Collateral based measurement |  | Discount to reflect current market conditions and ultimate collectability |  | 10% - 15% (12%)
Mortgage servicing rights |  | $ | 5,892 |  |  | Discounted cashflows |  | Discount rate, Constant prepayment rate, Probably of default |  | 10% - 15% (12%), 4% - 7% (4.6%), 1% - 10% (4.5%)
|  | Fair Value at December 31, 2012 |  |  | Valuation Technique |  | Unobservable Inputs |  | Range (Weighted Average)
Impaired loans |  | $ | 8,652 |  |  | Collateral based measurement |  | Discount to reflect current market conditions and ultimate collectability |  | 10% - 15% (12%)
Mortgage servicing rights |  | $ | 5,145 |  |  | Discounted cashflows |  | Discount rate, Constant prepayment rate, Probably of default |  | 10% - 15% (12%), 4% - 7% (4.6%), 1% - 10% (4.5%)

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- Definition Tabular disclosure of the amount of gains or losses for the period included in earnings or resulted in a change to net assets, have arisen from the use of significant unobservable inputs (level 3) to measure the fair value of assets, liabilities, and financial instruments classified in shareholders' equity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1),(d) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of assets and liabilities by class, including financial instruments measured at fair value that are classified in shareholders' equity, if any, that are measured at fair value on a nonrecurring basis in periods after initial recognition (for example, impaired assets). Disclosures may include, but are not limited to: (a) the fair value measurements recorded and the reasons for the measurements and (b) the level within the fair value hierarchy in which the fair value measurements are categorized in their entirety (levels 1, 2, 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19296-110258 + Details
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